O you who believe! be not like those who disbelieve and say of their brethren when they travel in the earth or engage in fighting: Had they been with us, they would not have died and they would not have been slain; so Allah makes this to be an intense regret in their hearts; and Allah gives life and causes death and Allah sees what you do.

And when a communication comes to them they say: We will not believe till we are given the like of what Allah's messengers are given. Allah best knows where He places His message. There shall befall those who are guilty humiliation from Allah and severe chastisement because of what they planned.