Cyril of Alexandria — as excerpted in the Catena Aurea on Luke 6:17-19

“When the ordination of the Apostles was accomplished, and great numbers were collected together from the country of Judæa, and from the sea coast of Tyre and Sidon, (who were idolaters,) he gave the Apostles their commission to be the teachers of the whole world, that they might recal the Jews from the bondage of the law, but the worshippers of devils from their Gentile errors to the knowledge of the truth. Hence it is said, And he came down with them, and stood in the plain, and a great multitude from Judæa, and the sea coast, &c.”