ISB ~ Acts 9 v23

many days had passed:Paul spent three years in Arabia before making his first trip to Jerusalem as a Christian (Gal 1:17-18).

plotted to kill him:The conspiracy orchestrated by hostile Jews also involved the governor of Damascus (2 Cor 11:32-33). For similar escapes (9:25) from walled cities, see Josh 2:15 and 1 Sam 19:12.