Hadith #3396 (Sahih al-Bukhari)
Book: Virtues and Merits of the Prophet (pbuh) and his Companions
Narrator(s): Han'i bin 'Uthman هانئ بن عثمان
Grade: Sahih

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.”

Source: https://parallelquran.com/hadith/sahih-al-bukhari-3396/