Genesis 16:1-3

1Abram’s wife, Sarai, had not borne any children for him, but she owned an Egyptian slave named Hagar.

2Sarai said to Abram, “Since the Lord has prevented me from bearing children, go to my slave; perhaps through her I can build a family.” And Abram agreed to what Sarai said.

3So Abram’s wife, Sarai, took Hagar, her Egyptian slave, and gave her to her husband, Abram, as a wife for him. This happened after Abram had lived in the land of Canaan ten years.