Qur’an 33:50—O Prophet! surely We have made lawful to you your wives whom you have given their dowries, and those whom your right hand possesses out of those whom Allah has given to you as prisoners of war ...
Qur’an 23:1-6—The Believers must (eventually) win through—those who humble themselves in their prayers; who avoid vain talk; who are active in deeds of charity; who abstain from sex, except with those joined to them in the marriage bond, or (the captives) whom their right hands possess—for (in their case) they are free from blame.
Qur’an 70:22-30—Not so those devoted to Prayer—those who remain steadfast to their prayer; and those in whose wealth is a recognized right for the (needy) who asks and him who is prevented (for some reason from asking); and those who hold to the truth of the Day Of Judgement; and those who fear the displeasure of their Lord—for their Lord’s displeasure is the opposite of Peace and Tranquility—and those who guard their chastity, except with their wives and the (captives) whom their right hands possess—for (then) they are not to be blamed.
Sahih Muslim 3371—We went out with Allah’s Messenger on the expedition to the Bi’l-Mustaliq and took captive some excellent Arab women; and we desired them, for we were suffering from the absence of our wives, (but at the same time) we also desired ransom for them. So we decided to have sexual intercourse with them but by observing azl (withdrawing the male sexual organ before emission of semen to avoid conception). But we said: We are doing an act whereas Allah’s Messenger is amongst us; why not ask him? So we asked Allah’s Messenger, and he said: It does not matter if you do not do it, for every soul that is to be born up to the Day of Resurrection will be born.
Sahih al-Bukhari 4138—We went out with Allah’s Apostle for the invasion of Bun Al-Mustaliq and we received captives from among the Arab captives and we desired women and celibacy became hard on us and we loved to do coitus interruptus [same as "azl" above]. So when we intended to do coitus interruptus, we said: "How can we do coitus interruptus before asking Allah’s Apostle who is present among us? We asked (him) about it and he said: "It is better for you not to do so, for if any soul till the Day of Resurrection is predestined to exist, it will exist."
Sahih Muslim 3384—Jabir bin Abdullah reported that a person asked Allah’s Apostle saying: I have a slave-girl and I practice azl with her, whereupon Allah’s Messenger said: This cannot prevent that which Allah has decreed. The person then came (after some time) and said: Messenger of Allah, the slave-girl about whom I talked to you has conceived, whereupon Allah’s Messenger said: I am the servant of Allah and His Messenger.
Qur’an 4:24—Also (prohibited are) women already married, except those whom your right hands possess ...
Sunan Abu Dawud 2150—The Apostle of Allah sent a military expedition to Awtas on the occasion of the battle of Hunain. They met their enemy and fought with them. They defeated them and took them captives. Some of the Companions of the Apostle of Allah were reluctant to have intercourse with the female captives in the presence of their husbands who were unbelievers. So Allah, the Exalted, sent down the Qur’anic verse: “And all married women (are forbidden) unto you save those (captives) whom your right hands possess.” That is to say, they are lawful for them when they complete their waiting period.