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].
App reference: Book 9, Hadith 210
Arabic/English book reference: Book 9, Hadith 1200