2:237
And if you divorce them from before [that] you (have) touched them while already you have specified for them an obligation (dower), then (give) half (of) what you have specified, unless [that] they (women) forgo (it) or forgoes the one in whose hands (is the) knot (of) the marriage. And that you forgo, (is) nearer to [the] righteousness. And (do) not forget the graciousness among you. Indeed, Allah of what you do (is) All-Seer.