Bukhari

Narrated `Ali: I said to Ibn `Abbas, "During the battle of Khaibar the Prophet forbade (Nikah) Al-Mut'a and the eating of donkey's meat."

Narrated Abu Jamra: I heard Ibn `Abbas (giving a verdict) when he was asked about the Mut'a with the women, and he permitted it (Nikah-al-Mut'a). On that a freed slave of his said to him, "That is only when it is very badly needed and women are scarce." On that, Ibn `Abbas said, "Yes."

Narrated Jabir bin `Abdullah and Salama bin Al-Akwa`: While we were in an army, Allah's Apostle came to us and said, "You have been allowed to do the Mut'a (marriage), so do it."

Narrated Jabir bin `Abdullah and Salama bin Al-Akwa`: While we were in an army, Allah's Apostle came to us and said, "You have been allowed to do the Mut'a (marriage), so do it."

Salama bin Al-Akwa` said: Allah's Apostle's said, "If a man and a woman agree (to marry temporarily), their marriage should last for three nights, and if they like to continue, they can do so; and if they want to separate, they can do so." I do not know whether that was only for us or for all the people in general. Abu `Abdullah (Al-Bukhari) said: `Ali made it clear that the Prophet said, "The Mut'a marriage has been cancelled (made unlawful).