John Chrysostom
Patristic
A.D. 347–407
“"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.”