One day the older daughter said to the younger, “Our father is old, and there is no man around here to give us children—as is the custom all over the earth.
If brothers are living together and one of them dies without a son, his widow must not marry outside the family. Her husband’s brother shall take her and marry her and fulfill the duty of a brother-in-law to her.
In that day seven women will take hold of one man and say, “We will eat our own food and provide our own clothes; only let us be called by your name. Take away our disgrace!”
so she said to Abram, “The Lord has kept me from having children. Go, sleep with my slave; perhaps I can build a family through her.” Abram agreed to what Sarai said.
The Nephilim were on the earth in those days—and also afterward—when the sons of God went to the daughters of humans and had children by them. They were the heroes of old, men of renown.