Hadith #360 (Sunan Ibn Majah)
Book: The Book of Purification and its Sunnah
Narrator(s): Abbas bin 'Abdul 'Azeem al-'Anbari عباس بن عبد العظيم العنبري, Bilal bin al-Harith al-Mazni

‘Aishah the wife of the Prophet said: “Umm Habibah Jahsh experienced prolonged non-menstrual bleeding for seven years when she was married to ‘Abdur-Rahman bin ‘Awf. She complained about that to the Prophet and the Prophet said: ‘That is not menstruation, rather it is a vein, so when the time of your period comes, leave the prayer, and when it is over, take a bath and perform prayer.'” ‘Aishah said: “She used to bathe for every prayer and then perform the prayer. She used to sit in a washtub belonging to her sister Zainab bint Jahsh and the blood would turn the water red.”

Source: https://parallelquran.com/hadith/sunan-ibn-majah-360/