"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."
Sunan an-Nasa'i Book 3, Hadith 5
← Previous Hadith "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."

Sunan an-Nasa'i Book 3, Hadith 4 Next Hadith → "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.'"

Sunan an-Nasa'i Book 3, Hadith 6