Wedlock, Marriage (Nikaah)
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 ".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)
From Sahih al-Bukhari, whose reports the scholars accept as authentic.