Hadith 1637
Jabir (May Allah be pleased with him) said:
عن جابر رضي الله عنه قال: أتي بأبي قحافة والد أبي بكر الصديق رضي الله عنهما يوم فتح مكة ورأسه ولحيته كالثغامة بياضًا، فقال رسول الله صلى الله عليه وسلم : "غيروا هذا واجتنبوا السواد" ((رواه مسلم)).
Abu Quhafah, father of Abu Bakr (May Allah be pleased with them) was presented to the Messenger of Allah (ﷺ) on the day of the conquest of Makkah and his head and beard were snow white. The Messenger of Allah (ﷺ) said, "Change it (i.e., dye it and avoid black colour)." [Muslim].
In plain words
Told to dye his hair, an elderly man with snow-white head and beard, change is allowed but steered away from black. Soften the marks of age naturally rather than disguise them into false youth.
Reference : Riyad as-Salihin 1637 In-book reference : Book 17, Hadith 127