(a) It is narrated from Sayyidah Aishah (may Allah be pleased with her) that Umm Habibah bint Jahsh (may Allah be pleased with her) had istihadah in the time of the Prophet (peace and blessings be upon him), and the Prophet (peace and blessings be upon him) ordered her to perform ghusl for every prayer.
(b) Imam Abu Dawud (may Allah have mercy on him) said: It is narrated from Sayyidah Aishah (may Allah be pleased with her) that Zaynab bint Jahsh (may Allah be pleased with her) had istihadah, and the Prophet (peace and blessings be upon him) said to her: "Perform ghusl for every prayer." (c) It is narrated from Imam Abu Dawud (may Allah have mercy on him) that Abd al-Samad narrated from Sulayman bin Kathir: "Perform ablution for every prayer." This is an error of Abd al-Samad, and the correct statement is that of Abu al-Walid. (d) The Shaykh said: The narration of Abu al-Walid is also not mahfuz (preserved).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحيض / 1641