1 Kings 20:13

So Joab and the people who were with him drew near for the battle against the Arameans, and they fled before him.

Then the prophet came near to the king of Israel and said to him, “Go, strengthen yourself and know and see what you have to do; for at the turn of the year the king of Aram will come up against you.”

Then a man of God came near and spoke to the king of Israel and said, “Thus says Yahweh, ‘Because the Arameans have said, “Yahweh is a god of the mountains, but He is not a god of the valleys,” therefore I will give all this great multitude into your hand, and you shall know that I am Yahweh.’”