"What would the Messenger of Allah ﷺ do as soon as he entered the house?" She replied: "(He would use) the siwak." (Using translation from Abū Dāʾūd 51)
قُلْتُ لِعَائِشَةَ بِأَيِّ شَيْءٍ كَانَ رَسُولُ اللهِ ﷺ يَبْدَأُ إِذَا دَخَلَ بَيْتَهُ؟ قَالَتْ بِالسِّوَاكِ