Genesis 16:2, 6

So Sarai said to Abram, “See here, the LORD has prevented me from bearing children. I am asking you to go in to [the bed of] my maid [so that she may bear you a child]; perhaps I will obtain children by her.” And Abram listened to Sarai and did as she said.

But Abram said to Sarai, “Look, your maid is entirely in your hands and subject to your authority; do as you please with her.” So Sarai treated her harshly and humiliated her, and Hagar fled from her.