That he asked `Abdullah bin Busr (i.e. the companion of the Prophet), "Did you see the Prophet (ﷺ) when he was old?" He said, "He had a few white hairs between the lower lip and the chin."
Sahih al-Bukhari Book 61, Hadith 55
← Previous Hadith I saw the Prophet (ﷺ) and saw some white hair below his lower lip above the chin.

Sahih al-Bukhari Book 61, Hadith 54 Next Hadith → I heard Anas bin Malik describing the Prophet (ﷺ) saying, "He was of medium height amongst the people, neither tall nor short; he had a rosy color, neither absolutely white nor deep brown; his hair was neither completely curly nor quite lank. Divine Inspiration was revealed to him when he was forty years old. He stayed ten years in Mecca receiving the Divine Inspiration, and stayed in Medina for ten more years. When he expired, he had scarcely twenty white hairs in his head and beard." Rabi`a said, "I saw some of his hairs and it was red. When I asked about that, I was told that it turned red because of scent. "

Sahih al-Bukhari Book 61, Hadith 56