Sunan Ibn Majah 1924
سنن ابن ماجه#1924SahihIt was narrated from Khuzaimah bin Thabit:That the Messenger of Allah (ﷺ) said: “Allah is not too shy to tell the truth,” three times. “Do not have intercourse with women in their buttocks.”
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Fouad Abd al-BaqiSahih
Shuaib Al ArnautSahih Lighairihi
Zubair Ali ZaiSahih
In-book reference: 9:80