It is narrated from Sayyiduna Jabir bin Abdullah al-Ansari (may Allah be pleased with them both) that Fatimah bint Qays (may Allah be pleased with her) asked the Messenger of Allah (peace and blessings be upon him) about the woman with istihadah (irregular bleeding): what should she do? He (peace and blessings be upon him) said: "She should refrain (from prayer) during the days of her menstruation, then each day she should perform a ritual bath (ghusl) at the time of every purification, and pray."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحيض / 1663
Hadith Gradingمحدثین:صحيح لغيرهٖ
Hadith Takhrij«صحيح لغيرهٖ۔ أخرجه الدار قطني 1/219»