The word(s) "vehement" appears 2 time(s) in 2 verse(s) in Quran in Abdullah Yusuf Ali translation.

(1) They said: "We are endued with strength, and given to vehement war: but the command is with thee; so consider what thou wilt command."

(2) Say to the desert Arabs who lagged behind: "Ye shall be summoned (to fight) against a people given to vehement war: then shall ye fight, or they shall submit. Then if ye show obedience, Allah will grant you a goodly reward, but if ye turn back as ye did before, He will punish you with a grievous Penalty."