John Calvin Commentary Acts 11:27

"Now in these days there came down prophets from Jerusalem unto Antioch." — Acts 11:27 (ASV)

Luke commends in this place the faith of the men of Antioch by its fruit, because they endeavored to relieve the poverty of that church, from which they received the gospel, with their abundance; and they did this unrequested. Such earnest care for the brethren does sufficiently declare how seriously they worshipped Christ, the head of all. Luke signifies that the fame of that church was spread abroad when he says that excellent men came there from Jerusalem.

But since the word prophet is understood in various ways in the New Testament, as we may learn from the First Epistle to the Corinthians, those are called prophets in this place who were endowed with the gift of prophesying, just as the four daughters of Philip will have the same title given to them later. And since the foretelling of the famine is attributed to Agabus alone, we may gather from this that this was granted to each one by a certain measure: to know things to come.