Arabic (Original)
قَالَ وَسَأَلْتُ عَائِشَةَ بِأَيِّ شَيْءٍ كَانَ يَبْدَأُ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِذَا دَخَلَ بَيْتَهُ قَالَتْ بِالسِّوَاكِ.
English Translation
She was asked with what the Prophet (peace be upon him) would begin when he entered his house. She said: "With the siwak (tooth-stick)."