Genesis 16:2–3

2 Sarai 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.G 3 So 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.