Hadith No: 1
Al-Bukhari - Al-Tarikh al-Kabir - Chapter on Kunya
Volume: (9) - Page Number: (25/26)
205 - Abu al-Humaira had companionship with him. Abu Asim said: from Iyyad, the father of Yahya, who said: Abu Dawud narrated to us from Abu al-Humaira, who said: I accompanied the Prophet (pbuh) for nine months, and he would come to the door of Ali and Fatima every day in the morning and say: "Peace be upon you, O People of the House":{ Allah only wants to remove the impurity from you, O People of the House, and to make you pure and spotless } (Surah Al-Ahzab 33:33).

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Reference: Tarikh al Kabeer Book 9

Hadith No: 2

'A'isha reported that Allah's Apostle (s.a.w.a.) went out one norning wearing a striped cloak of the black camel's hair that there came Hasan b. 'Ali. He wrapped hitn under it, then came Husain and he wrapped him under it along with the other one (Hasan). Then came Fatima and he took her under it, then came 'Ali and he also took him under it and then said:

Allah only desires to take away any uncleanliness from you, O people of the household, and purify you (thorough purifying)

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Reference: Saheeh Muslim Book 44 Tradition No. 91