Then Barnabas brought him to the apostles and described how Saul had seen the Lord, who had spoken to him on the road to Damascus, and how Saul had spoken boldly in that city in the name of Jesus.
27. When Barnabas had taken him. Whereas the disciples fled so fast from Paul, that was, peradventure, a point of too great fearfulness, “Id nimiae forsan timiditatis fuit,” that, perhaps, was owing to too great timidity. and yet he speaketh of none of the common sort, but of the apostles themselves.
Luke here makes no mention of Paul's journey into Arabia, which he tells us himself was immediately after his conversion, Gal 1:16, Gal 1:17. As soon as God had revealed his Son in him, that he might preach him, he went not up to Jerusalem, to receive instructions from the apostles (as any other convert would have done, that was designed for the ministry), but...
Commenting on Acts 9:23-31
And be was with them,.... Peter and James, and the rest of the disciples; he lived with them, conversed with them, and joined with them in all religious exercises; which is signified by his coming in and going out at Jerusalem; no one of the apostles or disciples forbidding or hindering him.