‘Uqbah bin ‘Amir reported the Apostle of Allaah ﷺ 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).  

عَنْ رَسُولِ اللَّهِ ﷺ أَنَّهُ قَالَ إِنَّ أَحَقَّ الشُّرُوطِ أَنْ تُوفُوا بِهِ مَا اسْتَحْلَلْتُمْ بِهِ الْفُرُوجَ