What he said after gathering them under a cloak
Umar ibn Abi Salamah was in the house and saw it.
اللَّهُمَّ هَؤُلاَءِ أَهْلُ بَيْتِي فَأَذْهِبْ عَنْهُمُ الرِّجْسَ وَطَهِّرْهُمْ تَطْهِيرًا
Allāhumma hāʾulāʾi ahlu baytī fa-adhhib ʿanhumu-r-rijsa wa ṭahhirhum taṭhīrā
“O Allah, these are the people of my house. Remove impurity from them and purify them completely.”
Where this comes from
The verse came down in Umm Salamah's house. He called Fatimah, Hasan and Husayn, wrapped them in a cloak, with Ali behind him, wrapped him too, and then prayed the words of the verse back over them.
The full narration
Narrated 'Umar bin Abi Salamah - the step-son of the Prophet (ﷺ):"When these Ayat were revealed to the Prophet (ﷺ): '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, and 'Ali was behind him, so he 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 I, Prophet of Allah?' He said: 'You are in your place (meaning you are already a member of my household), and you are goodness
Source
Jāmiʿ at-Tirmidhī · 3205
- Ahmad Muhammad Shakir: Sahih
- Al-Albani: Sahih
- Zubair Ali Zai: Sahih