Jamieson, Fausset and Brown on 1 Kings 20:22-26

22-26. the prophet came to the king of Israel, and said--The same prophet who had predicted the victory shortly reappeared, admonishing the king to take every precaution against a renewal of hostilities in the following campaign.

at the return of the year--that is, in spring, when, on the cessation of the rainy season, military campaigns (2Sa 11:1), were anciently begun. It happened as the prophet had forewarned. Brooding over their late disastrous defeat, the attendants of Ben-hadad ascribed the misfortune to two causes--the one arose from the principles of heathenism which led them to consider the gods of Israel as "gods of the hills"; whereas their power to aid the Israelites would be gone if the battle was maintained on the plains. The other cause to which the Syrian courtiers traced their defeat at Samaria, was the presence of the tributary kings, who had probably been the first to take flight; and they recommended "captains to be put in their rooms." Approving of these recommendations, Ben-hadad renewed his invasion of Israel the next spring by the siege of Aphek in the valley of Jezreel (compare 1Sa 29:1, with 1Sa 28:4), not far from En-dor.