If he takes another wife, he shall not diminish her food, her clothing, and her marriage rights.
Exodus 21:10
Surrounding context
21:9 And if he has betrothed her to his son, he shall deal with her according to the custom of daughters.
21:10 If he takes another wife, he shall not diminish her food, her clothing, and her marriage rights.
21:11 And if he does not do these three for her, then she shall go out free, without paying money.