It is narrated from Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) that, after he had gone in to Sayyidah Fatimah (may Allah be pleased with her), the Messenger of Allah (peace and blessings be upon him) came to the door of Sayyiduna Ali (may Allah be pleased with him) for forty mornings, saying: 'As-salamu alaykum ahl al-bayt wa rahmatullahi wa barakatuh' (Peace be upon you, O people of the household, and the mercy of Allah and His blessings). Then he would say: "The prayer (its time has come), may Allah have mercy on you." "Allah only intends to remove impurity from you, O people of the household, and to purify you with a thorough purification."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Abdullah bin Muslim al-Mula'i except Ibrahim bin Habib."
Hadith Referenceالمعجم الأوسط / باب الميم / 8127
Hadith Gradingمحدثین:إسناده ضعيف، فيه من لم يُعرف
Hadith Takhrij«قال الهيثمي: فيه من لم أعرفهم «مجمع الزوائد ومنبع الفوائد، ج 9، ص 169»»