that Allah's Apostle (ﷺ) 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 (AhlulBayt), and purify you (thorough purifying) - (Quran 33:33)

"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 and you are goodness.'"