Sahih al-Bukhari 5117
Sahih al-Bukhari · Book 67: Wedlock, Marriage (Nikaah) · Allah's Messenger (saws) prohibited Nikah-al-Mut'a lately.
Narrated Jabir bin `Abdullah and Salama bin Al-Akwa`:
حَدَّثَنَا عَلِيٌّ ، حَدَّثَنَا سُفْيَانُ ، قَالَ عَمْرٌو عَنِ الْحَسَنِ بْنِ مُحَمَّدٍ ، عَنْ جَابِرِ بْنِ عَبْدِ اللَّهِ ، وَسَلَمَةَ بْنِ الأَكْوَعِ ، قَالاَ كُنَّا فِي جَيْشٍ فَأَتَانَا رَسُولُ اللَّهِ صلى الله عليه وسلم فَقَالَ " إِنَّهُ قَدْ أُذِنَ لَكُمْ أَنْ تَسْتَمْتِعُوا فَاسْتَمْتِعُوا " .
While we were in an army, Allah's Messenger (ﷺ) came to us and said, "You have been allowed to do the Mut'a (marriage), so do it."