…] And it came to pass when the children of men began to multiply on the face of the earth and daughters were born unto them, that the angels of God saw them on a certain year of this jubilee, that they were beautiful to look upon; and they took themselves wives of all whom they chose, and they bare unto them sons and they were giants. And lawlessness increased on the earth and all flesh corrupted its way, alike men and cattle and beasts and birds and everything that walks on the earth - all of them corrupted their ways and their orders, and they began to devour each other, and lawlessness increased on the earth and every imagination of the thoughts of all men (was) thus evil continually.
…] Noah began to enjoin upon his sons’ sons the ordinances and commandments, and all the judgments that he knew, and he exhorted his sons to observe righteousness, and to cover the shame of their flesh, and to bless their Creator, and honour father and mother, and love their neighbour, and guard their souls from fornication and uncleanness and all iniquity. For owing to these three things came the flood upon the earth, namely, owing to the fornication wherein the Watchers against the law of their ordinances went a whoring after the daughters of men, and took themselves wives of all which they chose: and they made the beginning of uncleanness. And they begat sons the Naphidim, and they were all unlike, and they devoured one another: and the Giants slew the Naphil, and the Naphil slew the Eljo, and the Eljo mankind, and one man another. And every one sold himself to work iniquity and to shed much blood, and the earth was filled with iniquity. And after this they sinned against the beasts and birds, and all that moves and walks on the earth: and much blood was shed on the earth, and every imagination and desire of men imagined vanity and evil continually.
- Book of Jubilees 4.14-24; 6.1-3; 7.20-25
So then I thought to myself that the conception was from Watchers or that the seed was from Holy Ones, or (belonged) to Nephil[im]; and my mind wavered because of this child. Then I, Lamech, became frightened, and I went to Bitenosh, my wi[fe and said to her,] “… by the Most High, by the Majestic Lord, the King of all A[ges], [with one of] the sons of heaven, that you truthfully make everything known to me, whether … you must tell me [truthfully] and without lies whether this .… Swear by the Most High, the Majestic Lord] by the King of all Ages that you are speaking to me truthfully and without lies …” Then Bitenosh, my wife, spoke to me with great vehemence; she cr[ied] and said, “O my brother and my lord, remember my pleasure … in the hea]t of the time, and my breath in the midst of its sheath. For *irth. And then my mind was much changed within me. … When Bathenosh, my wife, noticed that my expression had changed … then she suppressed her emotion, speaking to me and saying to me, “O my lord and [my brother, recall] my pleasure. I swear to you by the Great Holy One, the King of H[eaven] that this seed from you; from you is this conception, and from you the planting of this fruit …and not from any stranger, or from any of the Watchers, or from any of the sons of hea[ven. Why is the expression] of your face so changed and deformed? (Why) is your spirit so depressed? [For I] am speaking to you truthfully.” (vacat)
Then I, Lamech, ran to Methuselah, my father, and I [told] him all everything [that he might go to Enoch], his father, and learn everything from him with certainty. For he (Enoch) is beloved and a fa[vorite of God, and with the Holy Ones] is his lot apportioned; and they make everything known to him. When [my father] Methuselah heard [my words, he ran] to Enoch his father to learn all from him in truth. … his good pleasure. He through the length of the land of Parvaim, and there he found Eno[ch, his father]. He said to Enoch his father, “O my father and my lord, because I have come here to [you …] reverenced (?) by you … *