Who Were the Nephilim? Giants, Watchers & the Book of Enoch

The Nephilim are the mysterious beings of Genesis 6:1–4 — born, the text says, in the days when the "sons of God" took human wives, in the verses that lead directly into the story of the flood. Most English Bibles have historically rendered the word as "giants," and Genesis calls them the mighty men of old, the men of renown. The Book of Enoch, an ancient Jewish work preserved complete only by the Ethiopian Orthodox Church, expands those four cryptic verses into the most famous untold story connected to the Bible: two hundred rebel angels called Watchers, an oath sworn on Mount Hermon, forbidden knowledge, and giant offspring whose violence brings on the deluge.

Few passages of Scripture have generated more questions from fewer words. Genesis spends exactly four verses on the Nephilim and never mentions them again except in a single terrified report from the land of Canaan. Yet those verses produced an entire ancient literature, echo in the New Testament, and helped shape how early Jews and Christians explained the existence of evil. This guide covers what Genesis actually says, how the Book of Enoch fills in the story, and what became of the tradition.

What Genesis Actually Says — and Why It Is So Cryptic

The Nephilim appear in Genesis 6:1–4, wedged between the genealogies of the patriarchs and the announcement of the flood. The passage moves fast: humanity multiplies, the "sons of God" see that the daughters of men are beautiful and take wives from among them, and God declares that his spirit will not remain in humanity forever, limiting their days to a hundred and twenty years. Then comes the famous line: "There were giants in the earth in those days" (Genesis 6:4, KJV) — and, the verse adds, also afterward, when the sons of God fathered children by human women. These were the heroes of old, the men of renown.

That is the entire account. The text never defines who the "sons of God" are, never describes the Nephilim, and — read closely — never even states outright that the Nephilim were the children of these unions, though most readers ancient and modern have drawn that conclusion. The grammar leaves the connection implied rather than spelled out.

Three main readings of the "sons of God" have competed for two thousand years. The oldest, attested in the Dead Sea Scrolls, the Septuagint tradition, and writers like Philo and Josephus, takes them as angelic beings. A later reading, which became mainstream in the church from the fourth century onward, takes them as the godly line of Seth intermarrying with the line of Cain. A third takes them as ancient kings or tyrants. Genesis itself arbitrates none of this — which is precisely the gap the Book of Enoch fills.

How the Book of Enoch Expands the Story

The Book of the Watchers — the oldest portion of 1 Enoch, composed in Aramaic around the third century BC and found in fragments among the Dead Sea Scrolls — retells Genesis 6 as a full narrative, with names, motives, and consequences.

In Enoch's telling, two hundred angels of the class called Watchers look down from heaven in the days of Jared and desire the daughters of men. Knowing the enormity of what they intend, they bind themselves by a mutual oath so that no one can back out alone. They descend on the summit of Mount Hermon — and the text makes a grim pun of the name, deriving it from the Hebrew word for a binding curse, because it was there that they bound themselves by anathema. Their leader is Shemihazah; among his chiefs is Azazel, who will come to bear the greater blame.

The Watchers take wives, and the wives bear giants — beings of impossible appetite. The Ethiopic text assigns them an absurd, legendary height of three thousand cubits. The giants devour the produce of humanity's labor until nothing is left, then turn on people themselves, then on birds, beasts, and creeping things, until — in one of the most arresting images in ancient literature — the earth itself brings accusation against the lawless ones, and the souls of the slain cry up to the gates of heaven.

Alongside the violence runs a second crime: forbidden knowledge. Azazel teaches men to forge swords and shields, and teaches women the arts of ornament — bracelets, cosmetics, the beautifying of the eyelids — while other Watchers teach spell-binding, root-cutting, astrology, and the reading of signs. The book's verdict is stark: the whole earth was corrupted through the works taught by Azazel. War and vanity, in Enoch's diagnosis, entered the world together, handed down from heaven's deserters.

Then heaven answers. The four archangels — Michael, Uriel, Raphael, and Gabriel — hear the cry of the earth and appeal to God, and the response unfolds like a sentence handed down in court. Uriel is sent to warn Noah that a deluge is coming. Raphael binds Azazel hand and foot and casts him into darkness in the desert of Dudael until the day of judgment. Gabriel is sent against the giants — not to strike them down directly, but to set them against one another in a war of mutual destruction, so that the Watchers must watch their own sons annihilate each other. Michael binds Shemihazah and the rest for seventy generations beneath the hills, until the final judgment. When the Watchers beg Enoch to carry a petition for mercy on their behalf, he does — and the text describes the petition being refused: beings who abandoned the high heaven for flesh, comes the reply, have no share in peace.

One more idea proved enormously consequential. The giants were part spirit and part flesh, and when their bodies were destroyed, Enoch says, their spirits remained on the earth as evil spirits — the book's explanation for the demons of later belief. It is a claim Genesis never makes, but it became a standard account of demonic origins among many early Christian writers.

What Did God Say About the Nephilim?

In Genesis, strikingly little. God is never recorded addressing the Nephilim at all. His one recorded statement in the passage concerns humanity — that his spirit will not remain in mankind forever, and that their days will be a hundred and twenty years, a verse read variously as a new lifespan limit or as a countdown to the flood. The judgment that follows in Genesis 6:5–7 is likewise aimed at human wickedness: God sees that every inclination of the human heart is evil, regrets making mankind, and resolves to blot out what he has made.

The Book of Enoch, by contrast, has God speak at length — though to the angels rather than to the giants. Through his archangels he pronounces that the Watchers will have no peace, that their petition is denied, that they will watch the destruction of their sons before being bound until judgment. The giants themselves receive their sentence indirectly: mutual destruction by the sword, with no share in the forgiveness their fathers begged for. Readers looking for a divine verdict on the Nephilim will find it in Enoch, not Genesis — which is one reason the book circulated so widely in antiquity.

Why Did God Destroy the Nephilim?

Genesis never explicitly says the flood was aimed at the Nephilim. The stated cause is broader: the earth was corrupt in God's sight and filled with violence, and all flesh had corrupted its way. But the placement of the Nephilim episode — immediately before the flood announcement, as the final scene of the pre-flood world — has led readers since antiquity to connect the two, and the word itself may carry the hint: nephilim appears to derive from the Hebrew verb "to fall."

The Book of Enoch makes the connection explicit. In its account the flood is heaven's answer to a world ruined twice over — by the giants' bloodshed, which had reached the point of humanity's destruction, and by the forbidden arts that had corrupted the survivors. The deluge functions as a cleansing: the earth that cried out under the giants is washed, the imprisoned Watchers await their final sentence beneath it, and Noah is preserved so that something uncorrupted survives. Where Genesis gives a general indictment of violence, Enoch supplies the specific crime scene.

Are the Nephilim Mentioned After the Flood?

Once. In Numbers 13:33, the Israelite spies return from scouting Canaan and report seeing the Anakim — the sons of Anak, whom the text connects to the Nephilim — beside whom they felt like grasshoppers. It is the only other occurrence of the word in the Hebrew Bible, and it creates an obvious puzzle: if the flood destroyed everything outside the ark, how are Nephilim standing in Canaan centuries later?

Readers have offered several answers, and the text supports more than one. Numbers itself frames the spies' account as a bad report — fearful men talking their nation out of entering the land, whose claims Caleb immediately disputes — so the Nephilim reference may be deliberate exaggeration, invoking the most terrifying name available. Others point to the curious phrase in Genesis 6:4 noting the Nephilim were on the earth in those days and also afterward, which reads almost like an editor's note anticipating the question. What is certain is that the Hebrew Bible remembers a family of giant peoples east and west of the Jordan — the Anakim, the Rephaim, the Emim, the Zamzummim, and Og king of Bashan, whose iron bed measured nine cubits — and that later narratives of David's wars still speak of oversized warriors from Gath, the city of Goliath. Whether these are meant as literal descendants or as the afterglow of a legend, the giants haunt the Bible's memory of Canaan long after the flood.

Were the Nephilim Really Giants?

The word itself does not mean "giant." Most scholars derive nephilim from the Hebrew naphal, "to fall" — hence "the fallen ones," which suits either fallen angels' offspring or warriors fallen in battle — though some connect it to an Aramaic word for giant. The Hebrew text of Genesis never gives them a height.

The giant tradition is, in large part, a translation tradition. When Jewish scholars rendered Genesis into Greek in the Septuagint, they chose gigantes — the word for the earthborn beings of Greek myth who warred against the gods — and the Latin Vulgate and the King James Version followed. It was a resonant choice, but it imported a whole mythology into four Hebrew verses. The Bible's association of the Nephilim with enormous stature rests mainly on the Numbers 13 report, where the connected Anakim are described as tall, and on the giant clans of Deuteronomy. The Book of Enoch, for its part, embraces the gigantic reading without reserve — three-thousand-cubit offspring who drain the land dry. Many modern translations now decline to decide, leaving Nephilim untranslated, which is why the "giants" of older Bibles have quietly vanished from newer ones.

The Book of Giants: The Story's Lost Sequel

Among the Dead Sea Scrolls found at Qumran are Aramaic fragments of a separate work scholars call the Book of Giants — a companion narrative to the Book of the Watchers, told largely from the giants' side of the story. In its surviving pieces, giants with names like Ohya, Hahya, and Mahway are shaken by ominous dreams of judgment — a tablet washed clean, a garden destroyed by fire and water — and dispatch one of their own to seek out Enoch the scribe, who interprets the visions and confirms the coming doom. In the strangest twist in the fragments, one of the giants bears the name Gilgamesh — the hero of the Mesopotamian epic, conscripted here into a Jewish tale of judgment.

The work was influential enough that the prophet Mani adopted it into his own scriptures centuries later, and Manichaean versions carried it across Asia in multiple languages. It survives only in fragments, but they are substantial enough to reconstruct much of the tale, and the Book of Giants is included, in modern English, in our Complete Books of Enoch edition alongside 1, 2, and 3 Enoch.

Why This Story Shaped the Ancient World — and Where It Went

The Watchers story was not a fringe curiosity. The New Testament letter of Jude quotes 1 Enoch 1:9 directly, citing Enoch, the seventh from Adam, as the source of a prophecy of the Lord coming with ten thousands of his holy ones — the clearest case of a New Testament author drawing on a book outside the Bible. Second Peter speaks of angels who sinned being cast into chains of gloomy darkness to await judgment, in the same breath as Noah and the flood; most scholars read the Watchers tradition standing behind both passages. Early Christian writers — Justin Martyr, Athenagoras, Irenaeus, Tertullian — took the angelic reading of Genesis 6 more or less for granted, and Tertullian argued around 200 AD that the Book of Enoch itself deserved acceptance, precisely because Jude had quoted it.

Then the tide turned. From the third century onward the Sethite interpretation gained ground, and Augustine's endorsement of it in The City of God effectively settled the question for the Latin church: the sons of God became the line of Seth, the angel marriages became a misreading, and the literature built on them lost its standing. When the church formalized its canon in the fourth century — the Council of Laodicea around 363 AD, Athanasius' festal letter of 367 — Enoch was left off the lists, classed among the apocrypha, and scribes gradually stopped copying it. By the Middle Ages the complete book had vanished from Europe, one of the most consequential of the lost books of the Bible.

It survived because one church made a different judgment. The Ethiopian Orthodox Tewahedo Church received the Book of Enoch as canonical Scripture, translated it into Ge’ez, and copied it in its monasteries for over a thousand years within its broader canon — the tradition behind the 88-book Ethiopian Bible. When the Scottish traveler James Bruce carried Ge’ez manuscripts back to Europe in 1773, the full Watchers story returned to the West after a millennium's absence, and the Aramaic fragments later found at Qumran confirmed that the Ethiopian scribes had faithfully preserved a genuinely ancient work.

The Nephilim endure because they sit at the seam between the Bible everyone knows and the library that grew up around it — four spare verses on one side, and on the other a vast, vivid ancient answer to the question those verses refuse to settle. The best way to weigh that answer is the way readers have always weighed it: by reading the book itself.