(1) باب بَدْءُ الْحِيضِ وَهَلْ يُسَمَّى الْحِيضُ نِفَاسًا
It was narrated that 'Aishah said:
"We went out with the Messenger of Allah (ﷺ) with no intention other than Hajj. When he was in Sarif I began menstruating. The Messenger of Allah (ﷺ) entered upon me and I was weeping. He said: 'What is the matter with you? Has you Nifas begun?' I said: 'Yes.' He said: 'This is something that Allah the Mighty and Sublime has decreed for the daughters of Adam. Do what the pilgrims do but do not perform Tawaf around the House.'"
Reference: Sunan an-Nasa'i 348
In-book reference: Book 3, Hadith 1
English translation: Vol. 1, Book 3, Hadith 349