Musannaf Ibn Abi Shaybah 1374 — What a woman with irregular bleeding

Sayyidah Hamnah bint Jahsh (may Allah be pleased with her) said that she developed istihadah in the time of the Messenger of Allah (peace and blessings be upon him), so she came to the Messenger of Allah (peace and blessings be upon him) and said: "I have been struck by extremely severe istihadah." He (peace and blessings be upon him) said: "Bind cotton firmly with a cloth." She said: "It is far more than that; it is gushing." The Prophet (peace and blessings be upon him) said: "Tie a cloth like a bridle, and observe menstruation every month for six or seven days, according to Allah's knowledge; then take a ritual bath, and pray and fast for twenty-three or twenty-four days. Delay Zuhr and pray Asr early, and take one ritual bath for the two of them. Then delay Maghrib and bring Isha forward, and take one ritual bath for the two of them. Of the two options, this is the more beloved to me."