Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
bayhaqi:178Abū ʿAbdullāh al-Ḥāfiẓ > Abū al-ʿAbbās Muḥammad b. Yaʿqūb > al-ʿAbbās b. Muḥammad al-Dūrī > ʿAbd al-Raḥman b. Ṣādir al-Madāyinī > ʿĪsá b. Shuʿayb > ʿAbdullāh b. al-Muthanná > al-Naḍr b. Anas b. Mālik

[Machine] The Messenger of Allah, ﷺ , said: "The reward for the fingers is like the reward for the Siwak (tooth-stick). This is what I found in the book of 'Isa bin Shu'ayb and it is a preserved narration from Ibn Al-Muthanna."  

البيهقي:١٧٨أَخْبَرَنَا أَبُو عَبْدِ اللهِ الْحَافِظُ ثنا أَبُو الْعَبَّاسِ مُحَمَّدُ بْنُ يَعْقُوبَ ثنا الْعَبَّاسُ بْنُ مُحَمَّدٍ الدُّورِيُّ ثنا عَبْدُ الرَّحْمَنِ بْنُ صَادِرٍ الْمَدَايِنِيُّ ثنا عِيسَى بْنُ شُعَيْبٍ ثنا عَبْدُ اللهِ بْنُ الْمُثَنَّى عَنِ النَّضْرِ بْنِ أَنَسِ بْنِ مَالِكٍ قَالَ

قَالَ رَسُولُ اللهِ ﷺ تَجْزِي الْأَصَابِعُ مَجْزَى السِّوَاكِ كَذَا وَجَدْتُهُ فِي كِتَابِ عِيسَى بْنِ شُعَيْبٍ وَالْمَحْفُوظُ مِنْ حَدِيثِ ابْنِ الْمُثَنَّى