Acts 13:2

"As they ministered to the Lord, and fasted, the Holy Ghost said, Separate Me Barnabas and Saul for the work whereunto I have called them." What means, "Ministering?" Preaching. "Separate for Me," it says, "Barnabas and Saul." What means, "Separate for Me?" For the work, for the Apostleship. See again by what persons he is ordained. By Lucius the Cyrenean and Manaen, or rather, by the Spirit. The less the persons, the more palpable the grace. He is ordained henceforth to Apostleship, so as to preach with authority.

But mark also the authority of the Holy Ghost: "As they ministered to the Lord, and fasted, the Holy Ghost said, Separate Me Barnabas and Saul." What being would have dared, if not of the same authority, to say this? "Separate," etc. But this is done, that they may not keep together among themselves. The Spirit saw that they had greater power, and were able to be sufficient for many. And how did He speak to them? Probably by prophets: therefore the writer premises, that there were prophets also. And they were fasting and ministering: that thou mayest learn that there was need of great sobriety. In Antioch he is ordained, where he preaches. Why did He not say, Separate for the Lord, but, "For me?" It shows that He is of one authority and power.