but Saul learned of their plot. Day and night they watched the city gates in order to kill him.
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
But their laying await was known of Saul,.... Either by divine revelation, or by some friends, who had got knowledge of it, and gave him information, as in Act 23:16 and they watched the gates night and day to kill him; that is, the Jews, together with the governor of the city, and the garrison of soldiers in it.
Verse 24. But their laying await. Their counsel; their design. Was known of Saul. Was made known to him. In what way this was communicated we do not know. This design of the Jews against Saul is referred to in , where it is said, "In Damascus, the governor under Aretas the king kept the Damascenes with a garrison, desirous to apprehend me; and through...