Matthew
Matthew 18:18BSB·traditional attribution

Truly I tell you, whatever you bind on earth will be bound in heaven, and whatever you loose on earth will be loosed in heaven.

John Calvin Reformed @genevareformer

18. What things soever you shall bind. He now repeats the same words which he had formerly used, (Matthew 16:19,) but in a different sense; for there he intended to maintain their authority in doctrine, but here he appoints discipline, which is an appendage to doctrine.

Matthew Henry Presbyterian @wholebiblehenry

As there never was a greater pattern of humility, so there never was a greater preacher of it, than Christ; he took all occasions to command it, to commend it, to his disciples and followers. I. The occasion of this discourse concerning humility was an unbecoming contest among the disciples for precedency; they came to him, saying, among themselves (for they were ashamed to ask...

Commenting on Matthew 18:1-35

John Gill Reformed Baptist @doctorgill

Then came Peter unto him,.... Having heard and observed the rules Christ gave concerning offences and brotherly reproofs, he drew near to Christ, and put this question to him: and said, Lord, how oft shall my brother sin against me, and I forgive him?