"Since we have heard that some who went out from us have troubled you with words, unsettling your souls ... Now Judas and Silas, themselves being prophets also, exhorted and strengthened the brethren with many words ... Paul and Barnabas also remained in Antioch, teaching and preaching the word of the Lord" (Acts 15:24,32,35).
There was a problem. There needed to be a response. Whenever God's people are being "troubled" and "unsettled" by those who speak their own "words" rather than the Word of the Lord, what are we to do? We must pray that God will raise up "prophets" who will preach the Gospel and teach the Word of God, strengthening the faith of God's people and leading them into a closer walk with God.