Masrouq bin al-Ajda' مسروق بن الأجدع · The Book of Purification

"The Messenger of Allah (ﷺ) used to like to start with the right whenever he could, when purifying himself and when putting on shoes or combing his hair." (One of the narrators) Shu'bah said: Then I heard Al-Ash'ath in Wasit, saying that he liked to start with the right, and he preferred that in all his affaris. Then I heard him in Al-Kufah saying that he liked to start with the right whenever he could."

"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."