Sahih al-Bukhari 5151

Arabic

حَدَّثَنَا أَبُو الْوَلِيدِ، هِشَامُ بْنُ عَبْدِ الْمَلِكِ حَدَّثَنَا لَيْثٌ، عَنْ يَزِيدَ بْنِ أَبِي حَبِيبٍ، عَنْ أَبِي الْخَيْرِ، عَنْ عُقْبَةَ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ ‏ "‏ أَحَقُّ مَا أَوْفَيْتُمْ مِنَ الشُّرُوطِ أَنْ تُوفُوا بِهِ مَا اسْتَحْلَلْتُمْ بِهِ الْفُرُوجَ ‏"‏‏.‏

English translation

Narrated `Uqba:The Prophet (ﷺ) said: "The stipulations most entitled to be abided by are those with which you are given the right to enjoy the (women's) private parts (i.e. the stipulations of the marriage contract)

Reference: Sahih al-Bukhari 5151, Book of Wedlock, Marriage (Nikaah). English translation by Dr. Muhammad Muhsin Khan.