Genesis 16:1-2
The Birth of Ishmael
16:1 Now Sarai, Abram’s wife, had not given birth to any children, but she had an Egyptian servant named Hagar.
16:2 So Sarai said to Abram, “Since the Lord has prevented me from having children, have sexual relations with my servant. Perhaps I can have a family by her.” Abram did what Sarai told him.