If he selects her for his son, he must grant her the rights of a daughter.
If he marries another woman, he must not deprive the first one of her food, clothing and marital rights.Exodus 21:10 NIV
If she does not please the master who has selected her for himself, he must let her be redeemed. He has no right to sell her to foreigners, because he has broken faith with her.Exodus 21:8 NIV