﴿ وَإِن فَاتَكُمْ شَىْءٌۭ مِّنْ أَزْوَٰجِكُمْ إِلَى ٱلْكُفَّارِ فَعَاقَبْتُمْ فَـَٔاتُوا۟ ٱلَّذِينَ ذَهَبَتْ أَزْوَٰجُهُم مِّثْلَ مَآ أَنفَقُوا۟ ۚ وَٱتَّقُوا۟ ٱللَّهَ ٱلَّذِىٓ أَنتُم بِهِۦ مُؤْمِنُونَ ﴾

“And if any of your wives should go over to the deniers of the truth, and you are thus afflicted in turn, then give unto those whose wives have gone away the equivalent of what they had spent [on their wives by way of dower], and remain conscious of God, in whom you believe!”

In this verse those terms have been mentioned on which a pledge is taken from a woman and after which she is taken into the fold of Islam. Among these conditions, two conditions are of basic importance, i.e. refraining from ascribing partners to God and obedience to the Prophet. The remaining stated and un-stated requirements are automatically included in these two conditions.