The Messenger of Allah ﷺ had hair that reached his shoulders. Bahz said, "It struck against his shoulders."
حدثنا وكيع وبهز قالا حدثنا همام عن قتادة قال بهز في حديثه أخبرنا قتادة
كان لرسول الله ﷺ شعر يصيب منكبيه وقال بهز يضرب منكبيه
Its isnad is sahih. Bukhari related it, 10/356, no. 5904, in the Book of Clothing, and Muslim, 4/1819, no. 2338, in the Book of Virtues, on the description of the Prophet ﷺ, and Abu Dawud, 4/81, no. 4183, and Tirmidhi, 4/219, no. 1724, who said, hasan sahih, and Nasai, 8/183, no. 5235.