(4) باب مَنْ سَمَّى النِّفَاسَ حَيْضًا
Narrated Um Salama:
While I was laying with the Prophet (ﷺ) under a single woolen sheet, I got the menses. I slipped away and put on the clothes for menses. He said, "Have you got "Nifas" (menses)?" I replied, "Yes." He then called me and made me lie with him under the same sheet.
Reference: Sahih al-Bukhari 298
In-book reference: Book 6, Hadith 5
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 1, Book 6, Hadith 297