Sahih Bukhari · Hadith 3590
Virtues and Merits of the Prophet (pbuh) and his Companions - كتاب المناقب
حدثنا أبو نعيم، حدثنا همام، عن قتادة، قال سألت أنسا هل خضب النبي صلى الله عليه وسلم قال لا، إنما كان شىء في صدغيه.
Narrated Qatada: I asked Anas, "Did the Prophet use to dye (his) hair?" He said, "No, for there were only a few white hairs on his temples."
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).