Quran 4:21 — Women (Al-Nesa')

How could you take it back, after you have been intimate with each other, and they had taken from you a solemn pledge?

[4:20] If you wish to marry another wife, in place of your present wife, and you had given any of them a great deal, you shall not take back anything you had given her. Would you take it fraudulently, maliciously, and sinfully?

[4:22] Do not marry the women who were previously married to your fathers—existing marriages are exempted and shall not be broken—for it is a gross offense, and an abominable act.