Troublesome Topic: WHAT DOES THE BOOK OF ENOCH SAY?
Here are a couple quotes from 1 Enoch. 6:1 “And it came to pass, when the sons of men had increased, that in those days there were born to them fair and beautiful daughters. 6:2 And the angels, the sons of heaven, saw them and desired them. And they said to one another: ‘Come, let us choose for ourselves wives from the children of men, and let us beget for ourselves children.’” https://www.thetorah.com/article/the-benei-elohim-the-watchers-and-the-origins-of-evil).
4QEn » 1 iii—En. 6:4-8: 1 (PI. Ill ) is the Qumran fragment from the Book of Watchers where the part about the Nephilim marrying human women and giving birth to giants is found.
Here is the English rendering of part of that passage as translated by Jozef T. Milik:
^Those (two hundred) and their leaders [all took for themselves] wives from all that they chose; and [they began to go in to them, and to defile themselves with them] and (they began) to teach them sorcery and [spell-binding, and the cutting the roots; and they showed them herbs]. ^And they became pregnant by them and bare [giants three thousand cubits high who] were born (and multiplied) on the earth [according to the kind of their childhood, and growing up according to the kind of their adolescence, ^and they were devouring] the labour of all the sons of men and [men] were unable [to supply them. ^But the giants] conspired to slay men, and [to devour them. And they began to sin and to …] against all birds and beasts of the earth, [and reptiles which creep upon the earth and (creatures) in the waters], and in the heaven, and the fish of the sea, and to devour the flesh [of one another, and they were drinking blood. ^Then the earth made the accusation against] the wicked, [concerning everything which was done upon it. https://ia801408.us.archive.org/9/items/MILIKEnochInAramaicQumranCave4/MILIK_Enoch-in-Aramaic-Qumran-Cave-4.pdf