وعن عائشة رضي الله عنها
قالت: كنا نعد لرسول الله، سواكه وطهوره، فيبعثه الله ما شاء أن يبعثه من الليل، فيتسوك ويتوضأ ويصلي
We used to prepare for the Messenger of Allah (sallallahu alayhi wa sallam) a Miswak (tooth-stick) and the water for making Wudu. Whenever Allah wished to awaken him from sleep at night, he (sallallahu alayhi wa sallam) would brush his teeth with Miswak, make Wudu, and perform Salat.
Riyad as-Salihin 1198, Book 9, The Book of Virtues, Hadith 208. 1 min read