As-Salāmu `Alaykum (السلام عليكم):

Sahih Bukhari Volume 4, Book 56, Number 668:

Narrated Abu Huraira:

Allah's Apostle 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)."

Where is the dye?

If you provide a view please maintain the spirit of this thread and include dalil (evidence) in manner as you see above so it can be researched. Insha Allah