John Lightfoot on Matthew 18:16

[Take with thee one or two more, &c.] The Hebrew lawyers require the same thing of him that sins against his brother: "Samuel saith, 'Whosoever sins against his brother, he must say to him, I have sinned against thee. If he hear, it is well: if not, let him bring others, and let him appease him before them. If perhaps he die, let him appease him at his sepulchre, and say, I have sinned against thee.'"

But our Saviour here requires a higher charity; namely, from him who is the offended party. In like manner, "The great Sanhedrim admonished a city lapsed to idols, by two disciples of the wise men. If they repented, well: if not, all Israel waged war against it." In like manner also, "The jealous husband warned his wife before two witnesses, 'Do not talk with N.'"