Deuteronomy 7:22-26

The LORD your God will drive those nations out ahead of you little by little. You will not clear them away all at once, otherwise the wild animals would multiply too quickly for you. But the LORD your God will hand them over to you. He will throw them into complete confusion until they are destroyed. He will put their kings in your power, and you will erase their names from the face of the earth. No one will be able to stand against you, and you will destroy them all. “You must burn their idols in fire, and you must not covet the silver or gold that covers them. You must not take it or it will become a trap to you, for it is detestable to the LORD your God. Do not bring any detestable objects into your home, for then you will be destroyed, just like them. You must utterly detest such things, for they are set apart for destruction.