Sahih al-Bukhari 5068

Reference	: Sahih al-Bukhari 5068
In-book reference	: Book 67, Hadith 6
USC-MSA web (English) reference	: Vol. 7, Book 62, Hadith 6

https://sunnah.com/bukhari/67/6

The Prophet (ﷺ) used to go round (have sexual relations with) all his wives in one night, and he had nine wives.