Albert Barnes Commentary Acts 15:23

"and they wrote [thus] by them, The apostles and the elders, brethren, unto the brethren who are of the Gentiles in Antioch and Syria and Cilicia, greeting:" — Acts 15:23 (ASV)

And wrote letters. Greek, Having written. He does not mean that they wrote more than one epistle.

By them. Greek, By their hand.

After this manner. Greek, These things.

Send greeting. A word of salutation, expressing their desire for the happiness (cairein) of the persons addressed. Compare to Matthew 26:49; Matthew 27:29; Luke 1:28; John 19:3.

In Antioch. Where the difficulty first arose.

And Syria. Antioch was the capital of Syria, and it is probable that the dispute was not confined to the capital.

And Cilicia. See Barnes on Acts 6:9.

Cilicia was adjacent to Syria. Paul and Barnabas had travelled through it; and it is probable that the same difficulty would exist there which had disturbed the churches in Syria.