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. 8 If 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. 9 But 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. 11 If he fails in any of these three obligations, she may leave as a free woman without making any payment.

Matthew Henry's Commentary on Exodus 21:7-11

Commentary on Exodus 21:1-11

(Read Exodus 21:1-11)

The laws in this chapter relate to the fifth and sixth commandments; and though they differ from our times and customs, nor are they binding on us, yet they explain the moral law, and the rules of natural justice. The servant, in the state of servitude, was an emblem of that state of bondage to sin, Satan, and the law, which man is brought into by robbing God of his glory, by the transgression of his precepts. Likewise in being made free, he was an emblem of that liberty wherewith Christ, the Son of God, makes free from bondage his people, who are free indeed; and made so freely, without money and without price, of free grace.