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:177ʿAlī b. Aḥmad b. ʿAbdān > Aḥmad b. ʿUbayd > Abū al-Ḍaḥḥāk b. Abū ʿĀṣim al-Nabīl > Muḥammad b. Mūsá > ʿĪsá b. Shuʿayb > Ibn al-Muthanná > al-Naḍr b. Anas from his father

[Machine] Abu al-Dhahak ibn Abi Asim Al-Nabeel narrated to me that Muhammad ibn Musa narrated to us, that Isa ibn Shuayb narrated to us, that Ibn al-Muthanna narrated it from Al-Nadr ibn Anas, from his father, who said: The Messenger of Allah ﷺ said, "Using the Siwak rewards for every finger." This narration was specifically mentioned by Uqbah ibn Mukram from Isa ibn Shuayb, and he is the only one who transmitted it through both chains of narration.  

البيهقي:١٧٧أَخْبَرَنَا عَلِيُّ بْنُ أَحْمَدَ بْنِ عَبْدَانَ أَخْبَرَنَا أَحْمَدُ بْنُ عُبَيْدٍ

حَدَّثَنِي أَبُو الضَّحَّاكِ بْنُ أَبِي عَاصِمٍ النَّبِيلُ ثنا مُحَمَّدُ بْنُ مُوسَى ثنا عِيسَى بْنُ شُعَيْبٍ ثنا ابْنُ الْمُثَنَّى عَنِ النَّضْرِ بْنِ أَنَسٍ عَنْ أَبِيهِ قَالَ قَالَ رَسُولُ اللهِ ﷺ تَجْزِي مِنَ السِّوَاكِ الْأَصَابِعُ تَابَعَهُمَا عُقْبَةُ بْنُ مُكْرَمٍ عَنْ عِيسَى بْنِ شُعَيْبٍ تَفَرَّدَ بِهِ عِيسَى بِالْإِسْنَادَيْنِ جَمِيعًا