An Nasai

"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.'"

"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."

"When the time of menstruation comes, stop praying, and when it goes, perform Ghusl."

"Umm Habibah bint Jahsh asked the Messenger of Allah (ﷺ): 'O Messenger of Allah, I suffer from Istihadah.' He said: 'That is a vein, so perform Ghusl, then pray.' And she used to perform Ghusl for each prayer."

"I saw her wash tub filled with blood." The Messenger of Allah (ﷺ) said to her: "Stop (praying) for as long as your period used to last, then perform Ghusl."

"A woman asked the Prophet (ﷺ): 'I suffer from Istihadah and I never become pure; should I stop praying?' He said: 'No. Stop praying for the number of days and nights that you used to menstruate, then perform Ghusl, wrap a cloth around yourself, and pray.'"

"Let her count the number of nights and days that she used to menstruate each month before this happened to her, and let her stop praying for that period of time each month. Then when that is over let her perform Ghusl, then wrap a cloth around herself, and pray."