Musannaf Ibn Abi Shaybah 1355 — What a woman with irregular bleeding

Sayyidah Aishah (may Allah be pleased with her) said that Sayyidah Fatimah bint Abi Hubaysh (may Allah be pleased with her) came to the Prophet (peace and blessings be upon him) and said: "I am a woman with istihadah (continuous bleeding) and I do not become pure; should I leave the prayer?" He (peace and blessings be upon him) said: "This is (the blood of) a vein; it is not menstruation. Leave the prayer during the days of your menstruation, then take a ritual bath (ghusl), perform ablution (wudu) for every prayer, and then keep praying, even if the blood drips onto the mat."