(Matthew 6:14-15) 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.
(Ephesians, 4:31-4:32) Let all bitterness, and wrath, and anger, and clamour, and evil speaking, be put away from you, with all malice. And be ye kind one to another, tenderhearted, FORGIVING one another, even as God for Christ's sake hath forgiven you.
(Mark 11:25-26) "And whenever you stand praying, if you have anything against anyone, forgive him and let it drop--leave it, let it go--in order that your Father Who is in heaven may also forgive you your failings and shortcomings and let them drop. But if you do not forgive, neither will your Father in heaven forgive your failings and shortcomings."