Jami` at-Tirmidhi, Volume 6, Book 46, Hadith 3787 (DarusSalam) ⓘ
Narrated 'Umar bin Abi Salamah - the step-son of the Prophet: "When these Ayat were revealed to the Prophet: 'Allah only wishes to remove the Rijs from you, O members of the family, and to purify you with a thorough purification...' (33:33) in the home of Umm Salamah, he called for Fatimah, Hasan, Husain, and wrapped him in the cloak, then he said: 'O Allah! These are the people of my house, so remove the Rijs from them, and purify them with a thorough purification.' So Umm Salamah said: 'And am I with them O Messenger of Allah?' He said: 'You are in your place, and you are more virtuous to me.'"
حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، حَدَّثَنَا مُحَمَّدُ بْنُ سُلَيْمَانَ الأَصْبَهَانِيُّ، عَنْ يَحْيَى بْنِ عُبَيْدٍ، عَنْ عَطَاءِ بْنِ أَبِي رَبَاحٍ، عَنْ عُمَرَ بْنِ أَبِي سَلَمَةَ، رَبِيبِ النَّبِيِّ صلى الله عليه وسلم قَالَ نَزَلَتْ هَذِهِ الآيَةُ عَلَى النَّبِيِّ صلى الله عليه وسلمَّ : ( إنمَا يُرِيدُ اللَّهُ لِيُذْهِبَ عَنْكُمُ الرِّجْسَ أَهْلَ الْبَيْتِ وَيُطَهِّرَكُمْ تَطْهِيرًا ) فِي بَيْتِ أُمِّ سَلَمَةَ فَدَعَا النَّبِيُّ صلى الله عليه وسلم فَاطِمَةَ وَحَسَنًا وَحُسَيْنًا فَجَلَّلَهُمْ بِكِسَاءٍ وَعَلِيٌّ خَلْفَ ظَهْرِهِ فَجَلَّلَهُ بِكِسَاءٍ ثُمَّ قَالَ " اللَّهُمَّ هَؤُلاَءِ أَهْلُ بَيْتِي فَأَذْهِبْ عَنْهُمُ الرِّجْسَ وَطَهِّرْهُمْ تَطْهِيرًا " . قَالَتْ أُمُّ سَلَمَةَ وَأَنَا مَعَهُمْ يَا نَبِيَّ اللَّهِ قَالَ " أَنْتِ عَلَى مَكَانِكِ وَأَنْتِ إِلَى خَيْرٍ " . قَالَ وَفِي الْبَابِ عَنْ أُمِّ سَلَمَةَ وَمَعْقِلِ بْنِ يَسَارٍ وَأَبِي الْحَمْرَاءِ وَأَنَسٍ . قَالَ وَهَذَا حَدِيثٌ غَرِيبٌ مِنْ هَذَا الْوَجْهِ .
also referenced under: Hadith 3787 (Reference) & Book 49, Hadith 4156 (In-Book)