Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) narrated: After Sayyidah Fatimah (may Allah be pleased with her) was sent to her husband's home, the Prophet (peace and blessings be upon him) kept coming to the door of Sayyiduna Ali (may Allah be pleased with him) for forty days, saying: "Peace be upon you, O People of the House, and the mercy of Allah Almighty and His blessings. O People of the House! Allah Almighty intends to remove impurity from you and to purify you thoroughly."
Al-Tabarani recorded it in al-Mu'jam al-Awsat, and its chain contains narrators whom I do not know.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب المناقب / 14987
Hadith Gradingمحدثین:إسنادہ ضعیف
Hadith Takhrij«اخرجه الطبراني فى المعجم الكبير (2673) ، أخرجه المعجم الأوسط للطبراني برقم: 8123»