Gen 6:1-4

The Wickedness of Humankind 1When people began to multiply on the face of the ground, and daughters were born to them,2the sons of God saw that they were fair; and they took wives for themselves of all that they chose.3Then the Lord said, “My spirit shall not abide in mortals forever, for they are flesh; their days shall be one hundred twenty years.”4The Nephilim were on the earth in those days—and also afterward—when the sons of God went in to the daughters of humans, who bore children to them. These were the heroes that were of old, warriors of renown.