Adam Clarke on Acts 15:3

Being brought on their way by the Church - That is; the members of the Church provided them with all necessaries for their journey; for it does not appear that they had any property of their own.

Declaring the conversion of the Gentiles - Much stress is laid on this: it was a miracle of God's mercy that the Gentiles should be received into the Church of God; and they had now the fullest proof that the thing was likely to become general, by the conversion of Cornelius, the conversion of the people of Antioch, of Cyprus, Pisidia, Pamphylia, Lycaonia, etc., etc.