(Imām Bukhārī narrates): Isma'il narrated to us, he said: Sulaiman bin Bilal narrated to me, he said that Hisham bin Urwah said that my father informed me, from Hazrat Aisha (may Allāh be pleased with her), she narrates that:
Hazrat Abdur Rahman bin Abi Bakr came, and with him was a miswak, with which he was cleaning his teeth. The Messenger of Allāh ﷺ looked towards him. I said: O Abdur Rahman! Give me this miswak. So he gave me that miswak. I bit its (front part), then I chewed it, then I gave that miswak to the Messenger of Allāh ﷺ. He used that miswak. At that time he was leaning against my chest.
حَدَّثَنَا إِسْمَاعِيلُ، قَالَ حَدَّثَنِي سُلَيْمَانُ بْنُ بِلاَلٍ، قَالَ قَالَ هِشَامُ بْنُ عُرْوَةَ أَخْبَرَنِي أَبِي، عَنْ عَائِشَةَ رَضِيَ اللَّهُ عَنْهَا
قَالَتْ دَخَلَ عَبْدُ الرَّحْمَنِ بْنُ أَبِي بَكْرٍ وَمَعَهُ سِوَاكٌ يَسْتَنُّ بِه، فَنَظَرَ إِلَيْهِ رَسُولُ اللَّهِ صَلَّى اللهُ عَلَيْهِ وَسَلَّمَ، فَقُلْتُ لَهُ أَعْطِنِي هَذَا السِّوَاكَ يَا عَبْدَ الرَّحْمَنِ، فَأَعْطَانِيهِ، فَقَصَمْتُهُ، ثُمَّ مَضَغْتُهُ فَأَعْطَيْتُه رَسُولَ اللَّهِ صَلَّى اللهُ عَلَيْهِ وَسَلَّمَ، فَاسْتَنَّ بِهِ وَهُوَ مُسْتَسْنِدٌ إِلَى صَدْرِي
Reference: Sahih Al Bukhari 890