Fighting for the Cause of Allah (Jihaad)

Bukhari :: Book 4 :: Volume 52 :: Hadith 178

Narrated 'Amr bin Taghlib:

The Prophet said, "One of the portents of the Hour is that you will fight with people wearing shoes made of hair; and one of the portents of the Hour is that you will fight with broad-faced people whose faces will look like shields coated with leather."