Wedlock, Marriage (Nikaah)
Ṣaḥīḥ al-Bukhārī 5119
أَيُّمَا رَجُلٍ وَامْرَأَةٍ تَوَافَقَا فَعِشْرَةُ مَا بَيْنَهُمَا ثَلاَثُ لَيَالٍ فَإِنْ أَحَبَّا أَنْ يَتَزَايَدَا أَوْ يَتَتَارَكَا تَتَارَكَا
ayyumā rajulin wāmraʾatin tawāfaqā faʿishrah mā baynahumā thalāthu layālin fa-in aḥabbā an yatazāyadā aw yatatārakā tatārakā
Transliteration generated from the Arabic vowel marks
The full narration
Salama bin Al-Akwa` said:Allah's Messenger (ﷺ) 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)
Source
Ṣaḥīḥ al-Bukhārī · 5119