O you who believe! When believing women come to you as emigrants, examine them, Allâh knows best as to their Faith, then if you ascertain that they are true believers, send them not back to the disbelievers, they are not lawful (wives) for the disbelievers nor are the disbelievers lawful (husbands) for them. But give the disbelievers that (amount of money) which they have spent [as their Mahr^[]] to them. And there will be no sin on you to marry them if you have paid their Mahr to them. Likewise hold not the disbelieving women as wives, and ask for (the return of) that which you have spent (as Mahr) and let them (the disbelievers, etc.) ask back for that which they have spent. That is the Judgement of Allâh. He judges between you. And Allâh is All-Knowing, All-Wise. (60:10)

 And if any of your wives have gone from you to the disbelievers, and you have an accession (by the coming over of a woman from the other side), then pay to those whose wives have gone, the equivalent of what they had spent (on their Mahr). And fear Allâh in Whom you believe. (60:11)

O Prophet! When believing women come to you to give you the Bai'â (pledge), that they will not associate anything in worship with Allâh, that they will not steal, that they will not commit illegal sexual intercourse, that they will not kill their children, that they will not utter slander, intentionally forging falsehood (i.e. by making illegal children belonging to their husbands), and that they will not disobey you in any Ma'rûf (Islâmic Monotheism and all that which Islâm ordains) then accept their Bai'â (pledge), and ask Allâh to forgive them, Verily, Allâh is Oft-Forgiving, Most Merciful. (60:12)