Exodus 21:9

9 Forsooth if he weddeth her to his son, he shall do to her by the custom of daughters (he shall treat her like 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 If any man selleth his daughter into a servantess, she shall not go out as handmaids were wont to go out; (If any man selleth his daughter to be a slave-girl, she shall not go out free like slaves can go out free;)

8 if she displeaseth in the eyes of her lord, to whom she was betaken, he shall deliver her; soothly he shall not have power, (or the right,) to sell her to an alien people, if he forsaketh her. (yea, if she displeaseth in the eyes of her lord, to whom she was delivered, then he shall sell her back to her father; and he shall not have the power, or the right, to sell her to a foreign people, if he forsaketh her.)

9 Forsooth if he weddeth her to his son, he shall do to her by the custom of daughters (he shall treat her like a daughter);

10 and if he take with this handmaid another woman, or wife, to his son, he shall purvey to the (first) damsel, or handmaid, weddings, and clothes, and he shall not deny her the price of (her) chastity, that is, the hour of yielding debt. (but if he get another wife, besides this woman, for his son, he shall still give this young woman her wedding, and her clothes, and he shall not deny her the rights of her marriage bed.)

11 If he doeth not to her these three (things), she shall go out freely without money. (And if he giveth her not these three things, then she shall go out free without payment of any money.)