Genesis 16:2-4 WEB

2 Sarai said to Abram," See now, Yahweh has restrained me from bearing. Please go in to my handmaid. It may be that I will obtain children by her." Abram listened to the voice of Sarai.
3 Sarai, Abram's wife, took Hagar the Egyptian, her handmaid, after Abram had lived ten years in the land of Canaan, and gave her to Abram her husband to be his wife.
4 He went in to Hagar, and she conceived. When she saw that she had conceived, her mistress was despised in her eyes.