What should those who doubt that Allah will give Muhammad victory do?
Woe unto each sinful liar, Who heareth the revelations of Allah recited unto him, and then continueth in pride as though he heard them not. Give him tidings of a painful doom. 45:7
What should those who doubt that Allah will give Muhammad victory do?
Go hang themselves
Whoso is wont to think (through envy) that Allah will not give him (Muhammad) victory in the world and the
Hereafter (and is enraged at the thought of his victory), let him stretch a rope up to the roof (of his dwelling),
and let him hang himself. 22:15