For he is God’s servant for your good. But if you do wrong, be afraid, for he does not carry the sword in vain. He is God’s servant, an agent of retribution to the wrongdoer.
- Romans 13:4
Indeed, none of you should suffer as a murderer or thief or wrongdoer, or even as a meddler.
- 1 Peter 4:15
Mercy and forgiveness must be free and unmerited to the wrongdoer. If the wrongdoer has to do something to merit it, then it isn't mercy, but forgiveness always comes at a cost to the one granting the forgiveness.