Ali bin Khashram علي بن خشرم · The Book of Purification

"I said to 'Aishah: 'What did the Prophet (ﷺ) start with when he entered his house?' She said: 'The Siwak.'"

"The Prophet (ﷺ) went out to relieve himself, and when he came back, I met him with a vessel (of water). I poured some for him and he washed his hands, then he washed his face. Then he wanted to wash his forearms but his Jubbah was too tight, so he brought them out from beneath the Jubbah to wash them, and he wiped over his Khuffs, then he led us in prayer."