John Chrysostom

"And when they had appointed for them," etc. Again the ordinations accompanied with fastings: and again fasting, that purifying of our souls. "And having prayed," it says, "with fastings, they commended them unto the Lord:" they taught them to fast also in their trials. Why did they not make elders in Cyprus nor in Samaria? …

Homily on Acts 31 ↗

Theophylact of Ohrid

"Having ordained elders for them, they prayed with fasting." They taught to fast even during times of trial; ordinations were also accompanied by fasting. But in Cyprus they did not appoint elders, nor in Samaria either, as it was near Jerusalem and the apostles, and in Antioch itself the word of God was being strengthened. But here the newly converted, and especially those from among the Gentiles who needed edification, required great support. …

Commentary on Acts ↗

Cassiodorus

"And passing through Pisidia, they came into Pamphylia," etc. It is related that, preaching in like manner through various cities, they departed for Antioch. There, they told the assembled faithful what great things the Lord had granted the Gentiles; how, opening the door of faith, he had thought fit to show them the truth in its fullest extent. …

Complexiones on the Acts of the Apostles ↗