(6) باب الشُّرُوطِ فِي الْمَهْرِ عِنْدَ عُقْدَةِ النِّكَاحِ
Narrated `Uqba bin Amir:
Allah's Messenger (ﷺ) said, "From among all the conditions which you have to fulfill, the conditions which make it legal for you to have sexual relations (i.e. the marriage contract) have the greatest right to be fulfilled."
Reference: Sahih al-Bukhari 2721
In-book reference: Book 54, Hadith 10
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 3, Book 50, Hadith 882