Genesis 16
1 Ref Now Sarai, Abram's wife, had given him no children; and she had a servant, a woman of Egypt whose name was Hagar.
2 Ref And Sarai said to Abram, See, the Lord has not let me have children; go in to my servant, for I may get a family through her. And Abram did as Sarai said.
3 Ref So after Abram had been living for ten years in the land of Canaan, Sarai took Hagar, her Egyptian servant, and gave her to Abram for his wife.