Matt. 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."

Heb. 12:15 "Looking diligently lest any man fail of the grace of God; lest any root of bitterness springing up trouble you, and thereby many be defiled;"

Eph. 4:32 "And be ye kind one to another, tenderhearted, forgiving one another, even as God for Christ's sake hath forgiven you."