Аль-Мумтахана 60:11

وَإِن فَاتَكُمْ شَيْءٌ مِّنْ أَزْوَاجِكُمْ إِلَى الْكُفَّارِ‌ فَعَاقَبْتُمْ فَآتُوا الَّذِينَ ذَهَبَتْ أَزْوَاجُهُم مِّثْلَ مَا أَنفَقُوا ۚ وَاتَّقُوا اللَّهَ الَّذِي أَنتُم بِهِ مُؤْمِنُونَ

And if some of your [ non-Muslim ] wives have slipped from you, [ and their present non-Muslim husbands do not pay to you the dower as aforesaid,] and you have your turn [ of paying dower to the previous non-Muslim husbands of your present wives ], then [ instead of paying dower to them,] give those whose wives have slipped the like amount of what they had paid [ to them ]. And fear Allah, the One in whom you believe. (60:11)

The verb ` aqabtum is derived from mu ` aqabah. It means 'to retaliate'. This meaning is possible here [ as reported by Qatadah, Mujahid and Qurtubi ]. In this case, it implies that if some of the wives of the Muslims desert to disbelievers, it was legally binding on them in terms of the treaty to pay back the dowers given to them by the Muslim husbands, just as the Muslims gave them back the dowers given by the pagan husbands to the emigrant Muslim women. But since the pagans failed to reciprocate, and did not pay the dower money, the believing husbands are entitled to retaliate by withholding an amount equal to what was due on the disbelieving husbands who married the deserting wives of the Muslims, and did not pay it. How this withheld amount will be spent is mentioned in the following sentence: فَآتُوا الَّذِينَ ذَهَبَتْ أَزْوَاجُهُم مِّثْلَ مَا أَنفَقُوا (... then [ instead of paying dower to them,] give those whose wives have slipped the like amount of what they had paid.) This means that the amounts withheld as aforesaid shall be given to the Muslims whose wives had gone to the pagans, and they did not pay back their dowers to their Muslim husbands.

Another sense of the verb ` aqabtum, aqqabtum and a'qabtum in its variant form is 'to acquire spoils of war'. The verb ` aqabtum is read in these variant forms (qira’ at) by various master readers of the Qur'an. Authorities like Qatadah and Mujahid have said that all these three forms of the verb mean to 'acquire spoils of war'. In this case the verse means: if the Muslim husbands' wives fled to the unbelievers and, in terms of the treaty, they did not return the dowers to the Muslim husbands, they would be compensated from the booty acquired in war.1

(1) A third interpretation of the word is that it is derived from 'aqibah' which means 'turn', and the infinitive mu'aqabah means 'to take turn in riding a horse etc.' In this case the verb aqabtum in the verse would mean: 'you have your turn', and the sense would be that when it is your turn to pay the dowers to the unbelievers, you should, instead of paying it to them, pay it to those Muslims whose wives have deserted them and joined the unbelievers who did not return to their husbands the dower they had paid to deserting wives and were entitled, by virtue of the treaty, to take it back from the unbelievers. This interpretation is adopted by 'Alusi in R4-ul-Ma’ ani, and by Maulana Ashraf Thanawi (رح) . The translation in the text is based on it. (Mulammad Taqi Usmani)

Did some of the Muslim Women become Apostates and flee to Makkah?

Some of the authorities believe that the situation mentioned in this verse arose only in one incident. The wife of Sayyidna ` Iyad Ibn Ghanam Quraishi, Umm-ul-Hakam bint Abi Sufyan, abandoned the Islamic Faith and fled to Makkah. However, later on she reverted to Islam.

Sayyidna Ibn ` Abbas ؓ reports that about six women altogether abandoned Islam and deserted to the unbelievers, one of whom is the woman whose name has been given in the previous paragraph. The other five of them were infidels from outset and remained in Makkah at the time of migration. When this verse was revealed dissolving the marriage between Muslims and pagans, they stubbornly clung to their disbelief and were not willing to embrace the Faith. As a result, these women were also counted among those whose dowers should be paid to their Muslim husbands by the pagans of Makkah. But they did not pay, so the Messenger of Allah ﷺ compensated for the loss of their dowers from the spoils of war.

This indicates that there is only one incident where a woman actually became an apostate and fled to Makkah from Madinah. The rest of the five women were unbelievers from beginning. As reported earlier, even the woman who abandoned Islam and fled to Makkah later on reverted to Islam. [ Qurtubi ]. Baghawi cites, on the authority of Sayyidna Ibn ` Abbas ؓ ، that all five women who are counted as apostates reverted to Islam later on. [ Mazhari ].