Exodus 21:7-10

7“When a man sells his daughter as a slave, she will not be freed at the end of six years as the men are.

8If she does not satisfy her owner, he must allow her to be bought back again. But he is not allowed to sell her to foreigners, since he is the one who broke the contract with her.

9But if the slave’s owner arranges for her to marry his son, he may no longer treat her as a slave but as a daughter.

10“If a man who has married a slave wife takes another wife for himself, he must not neglect the rights of the first wife to food, clothing, and sexual intimacy.