Forgiveness is the law of Christ.
[Mar 11:25-26
25 "And whenever you stand praying, if you have anything against anyone, forgive him, that your Father in heaven may also forgive you your trespasses.
26 "But if you do not forgive, neither will your Father in heaven forgive your trespasses."
[Mat 18:35
35 "So My heavenly Father also will do to you if each of you, from his heart, does not forgive his brother his trespasses."