Riyad as-Salihin 1200
Shuraih bin Hani (May Allah be pleased with him) reported:
I asked 'Aishah (may Allah be pleased with her): "What was the first thing which the Prophet (ﷺ) would do when he entered his house?" She replied: "He would use Miswak (tooth-stick)." [Muslim] .
وعن شريح بن هانئ قال‏:‏ قلت لعائشة، رضي الله عنها‏:‏ بأي شيء كان يبدأ النبي صلى الله عليه وسلم إذا دخل بيته‏.‏ قالت‏:‏ بالسواك‏.‏ ‏(‏‏(‏رواه مسلم‏)‏‏)‏‏.‏