Sunan Abi Dawud, Hadith 2134 ⓘ
‘Uqbah bin ‘Amir reported the Apostle of Allaah as saying “The condition worthier to be fulfilled by you is the one by which you made the private parts (of your wife) lawful (for you).
حَدَّثَنَا عِيسَى بْنُ حَمَّادٍ، أَخْبَرَنِي اللَّيْثُ، عَنْ يَزِيدَ بْنِ أَبِي حَبِيبٍ، عَنْ أَبِي الْخَيْرِ، عَنْ عُقْبَةَ بْنِ عَامِرٍ، عَنْ رَسُولِ اللَّهِ صلى الله عليه وسلم أَنَّهُ قَالَ " إِنَّ أَحَقَّ الشُّرُوطِ أَنْ تُوفُوا بِهِ مَا اسْتَحْلَلْتُمْ بِهِ الْفُرُوجَ " .
also referenced under: Hadith 2139 (DarusSalam)