Bereshis 6:3-5

Orthodox Jewish Bible

³ And Hashem said, My Ruach [Hakodesh] shall not always strive with Adam, for that he also is basar: yet his yamim shall be a hundred and twenty shanah.

⁴ HaNefilim were on ha’aretz in those yamim; and also after that, when the bnei HaElohim came in unto the banot HaAdam, and they bore children to them, the same became gibborim which were of old, men of renown.

⁵ And Hashem saw that the wickedness of HaAdam was great in ha’aretz and that every yetzer (inclination) of the machshevot (thoughts) of his lev was only rah (evil) continually.