"That is a vein, so when the time of menstruation comes, stop praying, and when it goes, take your bath and wash the blood from yourself then pray."
Sunan an-Nasa'i Book 3, Hadith 2
← Previous Hadith "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.'"

Sunan an-Nasa'i Book 3, Hadith 1 Next Hadith → "When the time of menstruation comes, stop praying, and when it goes, perform Ghusl."

Sunan an-Nasa'i Book 3, Hadith 3