Deuteronomy 13:17-18 NKJV
So none of the accursed things shall remain in your hand, that the Lord may turn from the fierceness of His anger and show you mercy, have compassion on you and multiply you, just as He swore to your fathers, because you have listened to the voice of the Lord your God, to keep all His commandments which I command you today, to do what is right in the eyes of the Lord your God.
This passage shows that God's mercy is not something we abuse. Deuteronomy 13 was a serious passage revealing that the Old Testament believers were instructed to be completely intolerant of people attempting to turn God's people away from Him to follow idols or false gods. The death penalty applied to those using persuasion or even supernatural signs to convince Israelites to pursue heathen gods. At the conclusion of this chapter, Moses said that when the people stood against false prophets or wicked people trying to lure them away from the true God, God could show them mercy. The Lord would relent from His anger and show compassion toward them. God's mercy is great but it is not to be abused. We have to respect God and respond to His correction. If God shows mercy toward us and we take Him for granted and act like we can do as we please and not suffer consequences, we will have a rude awakening. We cannot mock God and get away with it. Let us appreciate God's mercy, get rid of things that are not pleasing to Him and repent of any evil in our lives.