1 Kings 20:21

17 And the young officers of the district governors marched out first. Now Ben-hadad had sent out scouts, who reported to him, “Men are marching out of Samaria.”

18 “If they have marched out in peace,” he said, “take them alive. Even if they have marched out for war, take them alive.”

19 Meanwhile, these young officers of the district governors marched out of the city, with the army behind them,

20 and each one struck down his opponent. So the Arameans fled, with the Israelites in pursuit. But Ben-hadad king of Aram escaped on horseback with the cavalry.

21 Then the king of Israel marched out and attacked the horses and chariots, inflicting a great slaughter on the Arameans.

22 Afterward, the prophet approached the king of Israel and said, “Go and strengthen your position, and take note what you must do, for in the spring the king of Aram will come up against you.”

23 Meanwhile, the servants of the king of Aram said to him, “Their gods are gods of the hills. That is why they prevailed over us. Instead, we should fight them on the plains; surely then we will prevail.

24 So do this: Dismiss all the kings from their positions and replace them with other officers.

25 And you must raise an army like the one you have lost—horse for horse and chariot for chariot—so we can fight the Israelites on the plain, where we will surely prevail.” And the king approved their plan and acted accordingly.

Read all of 1 Kings 20