"The conditions that are most deserving of fulfillment, are those by means of which the private parts become allowed to you." (Using translation from Nasāʾī 3281)
عَنْ رَسُولِ اللهِ ﷺ قَالَ «إِنَّ أَحَقَّ الشُّرُوطِ أَنْ تُوفُوا بِهِ مَا اسْتَحْلَلْتُمْ الْفُرُوجَ»