Matthew 5:

20 For I tell you that unless your righteousness exceeds that of the scribes and Pharisees, there is no way you will enter into the Kingdom of Heaven.

21 “You have heard that it was said to the ancient ones, ‘You shall not murder;’ and ‘Whoever shall murder shall be in danger of the judgment.’ 22 But I tell you, that everyone who is angry with his brother without a cause shall be in danger of the judgment; and whoever shall say to his brother, ‘Raca!’ shall be in danger of the council; and whoever shall say, ‘You fool!’ shall be in danger of the fire of Gehenna. 23 “If therefore you are offering your gift at the altar, and there remember that your brother has anything against you, 24 leave your gift there before the altar, and go your way. First be reconciled to your brother, and then come and offer your gift. 25 Agree with your adversary quickly [Don’t put it off – editor], while you are with him in the way; lest perhaps the prosecutor deliver you to the judge, and the judge deliver you to the officer, and you be cast into prison. 26 Most certainly I tell you, you shall by no means get out of there, until you have paid the last penny.

This prison terminology is similar to what Jesus speaks of in Matthew 18: [WordPower!] Jesus on forgiving to be free from demons in Matthew 18: “So my heavenly Father will also do to you, if you don’t each forgive your brother from your HEARTS for his misdeeds.”
I suspect that reconciliation is usually a salvation issue, and it’s absolutely much of what real revivals are made of:
Asbury Revival, 1970: “‘Dr. Kinlaw, I am a liar. Now what do I do?’ … Three days later, she came to me radiant, and she said, ‘Dr. Kinlaw, I’m free!’”

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Related:
Jesus: “Whoever shall say, ‘You fool!’ shall be in danger of the fire of Hell!”