Genesis 6:2-4

Complete Jewish Bible

² the sons of God saw that the daughters of men were attractive; and they took wives for themselves, whomever they chose. ³ Adonai said, “My Spirit will not live in human beings forever, for they too are flesh; therefore their life span is to be 120 years.” ⁴ The N’filim were on the earth in those days, and also afterwards, when the sons of God came in to the daughters of men, and they bore children to them; these were the ancient heroes, men of renown.