"O believers! Indeed, many rabbis and monks consume people's wealth wrongfully and hinder others from the Way of Allah. Give good news of a painful torment to those who hoard gold and silver and do not spend it in Allah's cause.
The Day will come when their treasure will be heated up in the Fire of Hell, and their foreheads, sides, and backs branded with it. It will be said to them, This is the treasure you hoarded for yourselves. Now taste what you hoarded!
Indeed, the number of months ordained by Allah is twelve—in Allah's Record since the day He created the heavens and the earth—of which four are sacred. That is the Right Way. So do not wrong one another during these months. And fight the polytheists together as they fight together against you. And know that Allah is with those mindful of Him.
