I Kings 20:27-28

And the children of Israel were mustered and given provisions, and they went against them. Now the children of Israel encamped before them like two little flocks of goats, while the Syrians filled the countryside. Then a man of God came and spoke to the king of Israel, and said, “Thus says the LORD: ‘Because the Syrians have said, “The LORD is God of the hills, but He is not God of the valleys,” therefore I will deliver all this great multitude into your hand, and you shall know that I am the LORD.’ ”