Matthew 18:17-18
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17And if he refuse to hear them, tell it unto the church: and if he refuse to hear the church also, let him be unto thee as the Gentile and the publican. 18Verily I say unto you, what things soever ye shall bind on earth shall be bound in heaven; and what things soever ye shall loose on earth shall be loosed in heaven.
Matthew 18:17-18 (ASV)