Sunan Abi Dawud 4198
سنن أبي داود#4198SahihNarrated Abu Hurairah:The Prophet (ﷺ) as saying: The inborn characteristics of man are five. Another version says: Five things are of the inborn characteristics of man: circumcision, shaving the pubes, plucking out hair under the armpit, paring the nails and clipping the moustaches
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 (5889) Sahih Muslim (257)
In-book reference: 35:40