Charles Ellicott Commentary Acts 9:29

"preaching boldly in the name of the Lord: and he spake and disputed against the Grecian Jews; but they were seeking to kill him." — Acts 9:29 (ASV)

Disputed against the Grecians.—It will be remembered that it was as the leader of the Hellenistic-Jews of the synagogue named in Acts 6:9 that Saul had first appeared in the history of the Church. Now, it would seem, he sought to undo the evil that he had then done, by preaching to them the faith which he had then opposed, and presenting, we may well believe, the very aspects of the truth that had been most prominent in Stephen’s teaching, and which, therefore, now, as then, roused them to a passionate frenzy. Twice, within a few weeks, the Apostle’s life was in danger.