Exodus 21:9

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

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 is not to leave as the male slaves do.
8 If 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.
9 Or if he chooses her for his son, he must deal with her according to the customary treatment of daughters.
10 If he takes an additional wife, he must not reduce the food, clothing, or marital rights of the first wife.
11 And if he does not do these three things for her, she may leave free of charge, without any exchange of money.