(42) باب الشُّرُوطِ فِي النِّكَاحِ .
It was narrated from 'Utbah bin 'Amir that the Messenger of Allah said:
"The conditions that are most deserving of fulfillment are those by means of which the private parts become permitted to you." (ID)
Reference (ID): Sunan an-Nasa'i 3282 (ID)
In-book reference (ID): Book 26, Hadith 87 (ID)
English translation (ID): Vol. 4, Book 26, Hadith 3284 (ID)