Matthew 18:16-19 New American Bible (Revised Edition) (NABRE)
16 [a]If he does not listen, take one or two others along with you, so that ‘every fact may be established on the testimony of two or three witnesses.’ 17 If he refuses to listen to them, tell the church.[b] If he refuses to listen even to the church, then treat him as you would a Gentile or a tax collector. 18 [c]Amen, I say to you, whatever you bind on earth shall be bound in heaven, and whatever you loose on earth shall be loosed in heaven. 19 [d]Again, [amen,] I say to you, if two of you agree on earth about anything for which they are to pray, it shall be granted to them by my heavenly Father.