Sunan Abi Dawud 4183
سنن أبي داود#4183SahihNarrated Al-Bara' : I did not see any man with locks hanging down to shoulders in red robe more beautiful than the Messenger of Allah (ﷺ). Muhammad b. Sulaiman added: He had hair which touched his shoulders. Abu Dawud said: Isra'il also transmitted it in a similar way from Abu Ishaq saying: "(his hair) touched his shoulders". Shu'bah added: (His hair) reached the lobes of his ears
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 (3551) Sahih Muslim (2337)
In-book reference: 35:25