Moreover if thy brother shall trespass against thee, 1) go and tell him his fault between thee and him alone:....But if he will not hear thee,
2) then take with thee one or two more,....
3) And if he shall neglect to hear them, tell it unto the church:
but if he neglect to hear the church, let him be unto thee as an heathen man and a publican.
Matthew 18:15-17
Christ took His own Advice:
1) He came Himself
I am come in my Father's name, and ye receive me not:
John 5:43
2) He gave us 2 Witnesses-Old & New Testaments
And I will give power unto my two witnesses,
Revelation 11:3
3) He gave a Church
....the remnant of her seed, which keep the commandments of God, and have the testimony of Jesus Christ.
Revelation 12:17