Sayyidah Aisha Siddiqa (may Allah be pleased with her) narrates: The Prophet Muhammad (peace be upon him) was asked about a woman suffering from istihada (non-menstrual bleeding), so he said: She should leave the prayer during her specific days, then perform ghusl once, and then perform wudu for every prayer.
Hadith Referenceصحیح ابن حبان / كتاب الطهارة / 1355
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح - انظر ما قبله.فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده صحيح، وهو مكرر ما قبله.