Sunan an-Nasa'i 3282
سنن النسائي#3282SahihIt 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
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiHasan
In-book reference: 26:87