Genesis 6:1-4
The Nephilim and the Daughters of Men
6Now it happened, when men began to multiply on the face of the land, and daughters were born to them, 2that the sons of God saw that the daughters of men were good in appearance; and they took wives for themselves, whomever they chose. 3Then Yahweh said, “aMy Spirit shall not 1strive with man forever 2,bbecause he indeed is flesh; 3nevertheless his days shall be 120 years.” 4The aNephilim were on the earth in those days, and also afterward, when the sons of God came in to the daughters of men, and they bore children to them. Those were the mighty men who were of old, men of renown.