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.
abudawud:145Abū Tawbah / al-Rabīʿ b. Nāfiʿ > Abū al-Malīḥ > al-Walīd b. Zawrān > Anas / Ibn Mālik

Whenever the Messenger of Allah ﷺ performed ablution, he took a handful of water, and, putting it under his chin, made it go through his beard, saying: Thus did my Lord command me.  

أبو داود:١٤٥حَدَّثَنَا أَبُو تَوْبَةَ يَعْنِي الرَّبِيعَ بْنَ نَافِعٍ حَدَّثَنَا أَبُو الْمَلِيحِ عَنِ الْوَلِيدِ بْنِ زَوْرَانَ عَنْ أَنَسٍ يَعْنِي ابْنَ مَالِكٍ

أَنَّ رَسُولَ اللَّهِ ﷺ كَانَ إِذَا تَوَضَّأَ أَخَذَ كَفًّا مِنْ مَاءٍ فَأَدْخَلَهُ تَحْتَ حَنَكِهِ فَخَلَّلَ بِهِ لِحْيَتَهُ وَقَالَ هَكَذَا أَمَرَنِي رَبِّي ﷻ  

قَالَ أَبُو دَاوُدَ ابْنُ زَوْرَانَ رَوَى عَنْهُ حَجَّاجُ بْنُ حَجَّاجٍ وَأَبُو الْمَلِيحِ الرَّقِّيُّ

See similar narrations below:

Collected by Bayhaqī
bayhaqi:247Abū ʿAlī al-Rūdhbārī > Abū Bakr b. Dāsah > Abū Dāwud > Abū Tawbah al-Rabīʿ b. Nāfiʿ > Abū al-Malīḥ > al-Walīd b. Zawrān > Anas b. Mālik

Whenever the Messenger of Allah ﷺ performed ablution, he took a handful of water, and, putting it under his chin, made it go through his beard, saying: Thus did my Lord command me. (Using translation from Abū Dāʾūd 145)   

البيهقي:٢٤٧أَخْبَرَنَا أَبُو عَلِيٍّ الرُّوذْبَارِيُّ أنا أَبُو بَكْرِ بْنُ دَاسَةَ أنا أَبُو دَاوُدَ ثنا أَبُو تَوْبَةَ الرَّبِيعُ بْنُ نَافِعٍ ثنا أَبُو الْمَلِيحِ ثنا الْوَلِيدُ بْنُ زَوْرَانَ عَنْ أَنَسِ بْنِ مَالِكٍ

أَنَّ رَسُولَ اللهِ ﷺ كَانَ إِذَا تَوَضَّأَ أَخَذَ كَفًّا مِنْ مَاءٍ فَأَدْخَلَهُ تَحْتَ حَنَكِهِ فَخَلَّلَ بِهِ لِحْيَتَهُ وَقَالَ هَكَذَا أَمَرَنِي رَبِّي ﷻ وَرُوِّينَا فِي ذَلِكَ عَنِ الزُّهْرِيِّ وَمُوسَى بْنِ أَبِي عَائِشَةَ وَغَيْرِهِمَا عَنْ أَنَسِ بْنِ مَالِكٍ