Surah 8. Al-Anfal, Ayah 71

I.e., by falsely pretending to a change of heart and an acceptance of Islam in order to be freed from the obligation of paying ransom.

Sc., "and He can, if He so wills, do it again". Thus, the Muslims are enjoined, by implication, to accept the declarations of the captives at their face value, and not to be swayed by mere suspicion of their motives. The possibility of treachery on the part of those captives, and even a later discovery that some of them had indeed played false, should not induce the Muslims to deviate from the course ordained by God.

If the kindness shown to them is abused by the prisoners of war when they are released, it is not a matter for discouragement to those who showed the kindness. Such persons have in their treachery shown already their treason to Allah, in that they took up arms against Allah's Prophet, and sought to blot out the pure worship of Allah. The punishment of defeat, which opened the eyes of some of their comrades, evidently did not open their eyes. But Allah knows all, and in His wisdom will order all things for the best. The Believers have done their duty in showing such clemency as they could in the circumstances of war. For them "Allah sufficeth" (viii. 62).