PREPARATION FOR PRAYER H 1221 "We would prepare for the Messenger of Allah, praise and peace be upon him, his miswak (toothbrush) and the water for his ablution so that whenever Allah awakened him during the night he could brush his teeth, make his ablution and offer his prayers." R 1221 Muslim with a chain up to Lady Ayesha, wife of the Prophet, may Allah be pleased with her, Mother of Believers who related this.
1198- وعن عائشة رضي الله عنها ، قالت : كُنَّا نُعِدُّ لِرسولِ الله صلى الله عليه وآله وسلم سِوَاكَهُ وَطَهُورَهُ ، فَيَبْعَثُهُ اللهُ مَا شَاءَ أنْ يَبْعَثَهُ مِنَ اللَّيْلِ ، فَيَتَسَوَّكُ ، وَيَتَوضَّأُ وَيُصَلِّي . رواه مسلم .