Matthew 18:34 (KJV)

And his fellowservant fell down at his feet, and besought him, saying, Have patience with me, and I will pay thee all.

And he would not: but went and cast him into prison, till he should pay the debt.

So when his fellowservants saw what was done, they were very sorry, and came and told unto their lord all that was done.

Then his lord, after that he had called him, said unto him, O thou wicked servant, I forgave thee all that debt, because thou desiredst me:

Shouldest not thou also have had compassion on thy fellowservant, even as I had pity on thee?

So likewise shall my heavenly Father do also unto you, if ye from your hearts forgive not every one his brother their trespasses.