Sunan Abi Dawud 4199
سنن أبي داود#4199SahihNarrated Abd Allah b. 'Umar:The Messenger of Allah (ﷺ) commanded to clip the moustaches and grow the beard long
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Zubair Ali ZaiSahih Bukhari (5892، 5893) Sahih Muslim (259)
In-book reference: 35:41