It is narrated from Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) that Atiyyah al-Awfi (may Allah have mercy on him) asked him: "Who are the People of the House (Ahl al-Bayt) about whom Allah said that He would remove impurity from them and purify them thoroughly?" So he counted five persons on his hand: "The Messenger of Allah (peace and blessings be upon him), Sayyiduna Ali (may Allah be pleased with him), Sayyidah Fatimah (may Allah be pleased with her), and Sayyiduna al-Hasan and Sayyiduna al-Husayn (may Allah be pleased with them both)." Sayyiduna Abu Sa'id (may Allah be pleased with him) said: "This verse was revealed in the house of the Mother of the Believers, Sayyidah Umm Salamah (may Allah be pleased with her)."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Harun (may Allah have mercy on him) except Sulayman (may Allah have mercy on him), and al-Ahwas (may Allah have mercy on him) is alone in narrating it from him."
Hadith Referenceالمعجم الأوسط / باب الألف / 1826
Hadith Gradingمحدثین:إسناده ضعيف لضعف عطية
Hadith Takhrij«قال الهيثمي: فيه عطية وهو ضعيف «مجمع الزوائد ومنبع الفوائد، ج 9، ص 168»» «أخرجه الطبراني فى «الكبير» برقم: 2673، والطبراني فى «الصغير» برقم: 375، والطبراني فى «الأوسط» برقم: 3456»