ʿAbdur-Rahman bin Abi Bakr came holding a Siwak with which he was cleaning his teeth. Allah's Apostle looked at him. I requested ʿAbdur-Rahman to give the Siwak to me and after he gave it to me I divided it, chewed it and gave it to Messenger of Allah ﷺ. Then he cleaned his teeth with it and (at that time) he was resting against my chest. (Using translation from Bukhārī 890)  

«دَخَلَ عَبْدُ الرَّحْمَنِ بْنُ أَبِي بَكْرٍ وَمَعَهُ سِوَاكٌ يَسْتَنُّ بِهِ» فَقُلْتُ لَهُ «أَعْطِنِي هَذَا السِّوَاكَ يَا عَبْدَ الرَّحْمَنِ فَأَعْطَانِيهِ فَقَضَمْتُهُ ثُمَّ مَضَغْتُهُ فَأَعْطَيْتُهُ رَسُولَ اللَّهِ ﷺ فَاسْتَنَّ بِهِ وَهُوَ مُسْتَنِدٌ إِلَى صَدْرِي»  

[Machine] That the Messenger of Allah ﷺ mentioned his story during his illness, in which Aisha said, "Abdul Rahman ibn Abu Bakr entered with a siwak and he used it to clean his teeth. The Messenger of Allah ﷺ looked at him and I said to him, 'Give me this siwak, O Abdul Rahman.' So he gave it to me and I chewed it and made it soft, then I gave it to the Messenger of Allah ﷺ and he used it while leaning against my chest." And in the narration of Abu Zakariyya from Aisha, she said, "Abdul Rahman ibn Abu Bakr entered and mentioned it."  

أَنَّ رَسُولَ اللهِ ﷺ فَذَكَرَتْ قِصَّتَهُ فِي مَرَضِهِ وَفِيهَا قَالَتْ دَخَلَ عَبْدُ الرَّحْمَنِ بْنُ أَبِي بَكْرٍ وَمَعَهُ سِوَاكٌ يَسْتَنُّ بِهِ فَنَظَرَ إِلَيْهِ رَسُولُ اللهِ ﷺ فَقُلْتُ لَهُ أَعْطِنِي هَذَا السِّوَاكَ يَا عَبْدَ الرَّحْمَنِ فَأَعْطَانِيهِ فَقَضَمْتُهُ ثُمَّ طَيَّبْتُهُ فَأَعْطَيْتُهُ رَسُولَ اللهِ ﷺ فَاسْتَنَّ وَهُوَ مُسْتَنِدٌ إِلَى صَدْرِي ﷺ وَفِي حَدِيثِ أَبِي زَكَرِيَّا عَنْ عَائِشَةَ قَالَتْ دَخَلَ عَبْدُ الرَّحْمَنِ بْنُ أَبِي بَكْرٍ فَذَكَرَهُ