The Woman Who Is Examined - 60:12
O Prophet, when the believing women take refuge with you, and they swear by their oaths not to associate anything with Allah, not to steal, not to commit adultery, not to kill their children, not to fabricate a falsehood, and not to oppose you in righteousness, then accept their oaths and ask forgiveness from Allah for them. Allah is Forgiving, Merciful.
Related:
The Woman Who Is Examined/60:10
O you who believe, when believing immigrant women take refuge with you, question them. Allah knows their faith very well. If you realize that they are believers, do not send them back to the disbelievers. They are not lawful for those disbelievers, nor are they lawful for them. Give back to them their marriages which the disbelievers have spent. There is no harm in your marrying them if you have paid them their mahr. Do not keep unbelieving women in your charge. You may ask them for the rasham you have spent on them, and they may ask for the rasham they have given you. This is the judgment of Allah. He judges between you. Allah is All-Knowing, All-Wise.