Exodus 21:7-10

7“When a man sells his daughter as a concubine, she is not to leave as the male slaves do.

8If she is displeasing to her master, who chose her for himself, then he must let her be redeemed. He has no right to sell her to foreigners because he has acted treacherously toward her.

9Or if he chooses her for his son, he must deal with her according to the customary treatment of daughters.

10If he takes an additional wife, he must not reduce the food, clothing, or marital rights of the first wife.