The Prophet ﷺ said, "The condition most deserving to be fulfilled is that by which you have made intimate relations lawful."
حدثنا عمرو بن عبد الله ومحمد بن إسمعيل قالا حدثنا أبو أسامة عن عبد الحميد بن جعفر عن يزيد بن أبي حبيب عن مرثد بن عبد الله
عن النبي ﷺ قال إن أحق الشرط أن يوفى به ما استحللتم به الفروج
Bukhari narrated it in the Book of Conditions, Chapter on Conditions Regarding the Dower at the Time of the Marriage Contract, no. 2741, from the hadith of Yazid, through this route, and Muslim, in the Book of Marriage, Chapter on Fulfilling Conditions in Marriage, no. 1418, from the hadith of Abdul-Hameed, through this route.