Ephesians 4:32.
FOR if ye forgive men their trespasses, your heavenly Father will also forgive you:
But if ye forgive not men their trespasses, neither will your Father forgive your trespasses.
Matthew 6:14, 15.
PUT on therefore, as the elect of God, holy and beloved, bowels of mercy, kindness, humbleness of mind, meekness, and longsuffering; Forbearing one another, and forgiving one another, if any man have a quarrel against any: even as Christ forgave you, so also do ye.
Colossians 3:12, 13.
If you refuse to forgive your neighbor, you make it impossible for God to forgive you.
LET all bitterness, and wrath, and anger, and clamour and evil speaking, be put away from you with all malice.
Ephesians 4:31.