And straightway he preached Christ in the synagogues, that he is the Son of God.
And straightway (that is, after the "certain days" spent in private with the disciples, Acts 9:19 ), he preached Christ. The true reading here unquestionably is, 'he preached Jesus' [with 'Aleph (') A B C E, etc., and most versions] - in favour of which the internal evidence from Acts 9:22 is nearly as strong as the external.
In the synagogues. The plurality of synagogues at Damascus, here noted, shows that there must have been a large body of Jews there; and Josephus (as Olshausen remarks) mentions that no fewer than ten thousand of them perished there in the reign of Nero (Jewish Wars, 1: 2, 25).
That he is the Son of God.