Exodus 21:9

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.

Exodus 21:9 Meaning and Commentary

Exodus 21:9

And if he have betrothed her unto his son
Not caring to betroth and marry her himself, as being more suitable in age for his son than for himself;

he shall deal with her after the manner of daughters;
as if she was his daughter, and give her a dowry: or the son shall treat her after the manner the daughters of Israel are treated when married, by giving her food, raiment, and the duty of marriage, so Jarchi: or after the manner of the daughters of Israel that are virgins, and who are not sold, as Aben Ezra.

Exodus 21:9 In-Context

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.