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Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
ahmad:15678 – Wakīʿ > Sufyān And ʿAbd al-Raḥman > Sufyān > ʿĀṣim b. ʿUbaydullāh > ʿAbdullāh b. ʿĀmir b. Rabīʿah from his father

[Machine] I saw the Messenger of Allah ﷺ doing things that I cannot count or enumerate while he was fasting. And 'Abdul-Rahman said, "I saw him using the siwak (tooth stick) while he was fasting."  

أحمد:١٥٦٧٨ – حَدَّثَنَا وَكِيعٌ حَدَّثَنَا سُفْيَانُ وَعَبْدُ الرَّحْمَنِ عَنْ سُفْيَانَ عَنْ عَاصِمِ بْنِ عُبَيْدِ اللهِ عَنْ عَبْدِ اللهِ بْنِ عَامِرِ بْنِ رَبِيعَةَ عَنْ أَبِيهِ قَالَ

رَأَيْتُ رَسُولَ اللهِ ﷺ مَا لَا أَعُدُّ وَمَا لَا أُحْصِي يَسْتَاكُ وَهُوَ صَائِمٌ وَقَالَ عَبْدُ الرَّحْمَنِ مَا لَا أُحْصِي يَتَسَوَّكُ وَهُوَ صَائِمٌ  

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Collected by Aḥmad
ahmad:15688 – Yaḥyá > Sufyān > ʿĀṣim b. ʿUbaydullāh > ʿAbdullāh b. ʿĀmir b. Rabīʿah from his father

I have seen the Messenger of Allah ﷺ using a tooth-stick while he was fasting. Musaddad added in his version: "more often than I could count." (Using translation from Abū Dāʾūd 2364)   

أحمد:١٥٦٨٨ – حَدَّثَنَا يَحْيَى عَنْ سُفْيَانَ عَنْ عَاصِمِ بْنِ عُبَيْدِ اللهِ عَنْ عَبْدِ اللهِ بْنِ عَامِرِ بْنِ رَبِيعَةَ عَنْ أَبِيهِ قَالَ

رَأَيْتُ رَسُولَ اللهِ ﷺ يَسْتَاكُ مَا لَا أَعُدُّ وَلَا أُحْصِي وَهُوَ صَائِمٌ