2 Thessalonians 3:15

“Now if your brother sins, go and show him his fault, between you and him alone; if he listens to you, you have won your brother.

“And if he refuses to listen to them, tell it to the church; and if he refuses to listen even to the church, let him be to you as the Gentile and the tax collector.

Brothers, even if anyone is caught in any transgression, you who are spiritual, restore such a one in a spirit of gentleness, each of you looking to yourself, so that you too will not be tempted.