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wa-l-muḥṣanātu mina n-nisāʾi ʾillā mā malakat ʾaymānukum kitāba llāhi ʿalaykum wa-ʾuḥilla lakum mā warāʾa dhālikum ʾan tabtaghū bi-ʾamwālikum muḥṣinīna ghayra musāfiḥīna fa-mā stamtaʿtum bihī minhunna fa-ʾātūhunna ʾujūrahunna farīḍatan wa-lā junāḥa ʿalaykum fī-mā tarāḍaytum bihī min baʿdi l-farīḍati ʾinna llāha kāna ʿalīman ḥakīman
and married women, excepting your slave-women. This is Allah’s ordinance for you. As to others than these, it is lawful for you to seek [temporary union with them] with your wealth, in wedlock, not in license. For the enjoyment you have had from them thereby, give them their dowries, by way of settlement, and there is no sin upon you in what you may agree upon after the settlement. Indeed Allah is all-knowing, all-wise.
— Ali Quli Qarai
Surah An-Nisa', Verse 24
24. "And all married women (are forbidden unto you to marry) except those whom your right hands possess (by Allah's decree in the battle against infidels). It is a written legislation of Allah unto you; and lawful for you are (all women) besides those that you may seek (them) by means of your wealth (as dower) taking them into marriage and not committing fornication. Then as to those of whom you seek content (by temporary marriage), give them their dowries as a duty; and there is no blame on you in whatever you mutually agree after the duty. Verily Allah is All-Knowing, All-Wise."
For non-Muslims, captivity is counted as divorce. It is like the Faith of a woman that when her husband continues his infidelity and the woman has embraced Islam; the very belief separates her from her husband. To take in marriage a woman who has husband is unlawful from the point of Islam. The woman may be from any nation and with any religion. But captivity is like divorce, and a captive woman should observe a waiting term for one month (one menstruation) from the time she is captured, and if she is in pregnancy period, she must wait until she is delivered of her child. Thus, during this period, no conjugal connection is admissible with her.
This matrimonial device, as a permanent or contemporary spouse, is better than the device of returning her to the infidels or leaving her alone with no guardian.
According to several traditions narrated from the holy Imams of Ahlul-Bayt (as), and also according to many commentary books recorded by the scholars of the Sunnis, this phrase of the verse refers to temporary marriage where the above-mentioned holy verse says: