Bismillah Walhamdulillah Was Salaatu Was Salaam ‘ala Rasulillah Narrated Abu Huraira (Radi-Allahu ‘anhu):
Allah’s Apostle (Sallallahu ‘Alaihi Wa Sallam) said, “The Jews and the Christians do not dye (their grey hair), so you shall do the opposite of what they do (i.e. dye your grey hair and beards).”
Bukhari Vol. 4 : No. 668