1 Enoch 7:2
1 And all the others together with them took unto themselves wives, and each chose for himself one, and they began to go in unto them and to defile themselves with them, and they taught them charms and enchantments, and the cutting of roots, and made them acquainted with plants. 2 And they became pregnant, and they bare great giants, whose height was three thousand ells: 3 Who consumed all the acquisitions of men. And when men could no longer sustain them, 4 the giants turned against them and devoured mankind.
Jubilees 7:22
21 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. 22 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. 23 And every one sold himself to work iniquity and to shed much blood, and the earth was filled with iniquity. 24 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.
Notes and References
"... August Dillmann argued that Jubilees is dependent on 1 Enoch, although his dating of 1 Enoch to the first Century BCE led him to date Jubilees incorrectly to the first Century CE. VanderKam has maintained that Jubilees 4:16–25, and 7:22 indicate that the author had some sort of knowledge of the Enochic books. The comparison with the Book of Dreams (1 Enoch 83–90) is the most vital given the other points of reference for dating argued above. If the author was acquainted with the Book of Dreams, either in its present form or in a hypothetical earlier form, then the terminus post quem is either 172 (hypothetical earlier form) or 164 BCE. This view has been challenged by Jacques van Ruiten, who argues that no verbal parallels between Jubilees 4:16–25 and the Book of Dreams are to be found, although few more vague parallels can be discerned. Moreover Jubilees 7:22 is according to van Ruiten closer to the Book of Watchers (1 Enoch 7:2). According to him, the thematic parallels are best explained by common traditions behind the Enochic books and Jubilees. Thus, one should not use the Book of Dreams in dating Jubilees, since there is too little evidence to show that Jubilees was dependent on the text of Book of Dreams ..."
Tanskanen, Topias K. E. Jacob, the Torah, and the Abrahamic Promise: Studies on the Use and Interpretation of the Jacob Story in the Book of Jubilees (p. 31) Åbo Akademi University, 2023