Wherefore the Lord his God delivered him into the hand of the king of Syria,.... Whose name was Rezin, Kg2 16:5, though that is an after expedition to this, which is there related. The Lord is called the God of Ahaz, because he was so of right; he had dominion over him, and ought to have been worshipped by him; and, besides, he was so by virtue of the national covenant between God and the people Ahaz was king of; and moreover, Ahaz professed he was his God, though in an hypocritical manner, and he forsook the true worship of him: and they smote him, and carried away a great multitude of them captives, and brought them to Damascus; whereas in a later expedition, related in Kg2 16:5, they did not succeed: and he was also delivered into the hand of the king of Israel; whose name was Pekah: who smote him with a great slaughter; as is next related.