ENOfficial
‘Uqba b. ‘Amir reported God’s Messenger as saying, “The most worthy conditions you fulfil are those by which you make sexual intercourse lawful." (Bukhari and Muslim.)
Source: sunnah.com
Other translations
Arabic
وَعَنْ عُقْبَةَ بْنِ عَامِرٍ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «أَحَقُّ الشُّرُوطِ أَنْ تُوفُوا بِهِ مَا اسْتَحْلَلْتُمْ بِهِ الْفروج»
sunnah.com