2 Kings 16:2-6

Ahaz was twenty years old when he became king, and he reigned for sixteen years in Jerusalem; and he did not do what was right in the sight of the Lord his God, as his father David had done.

But he walked in the way of the kings of Israel, and he even made his son pass through the fire, in accordance with the abominations of the nations whom the Lord had driven out before the sons of Israel.

And he sacrificed and burned incense on the high places, on the hills, and under every green tree.

Then Rezin the king of Aram and Pekah the son of Remaliah, king of Israel, went up to Jerusalem for war; and they besieged Ahaz, but were not capable of fighting him.

At that time Rezin king of Aram restored Elath to Aram, and drove the Judeans away from Elath; and the Arameans came to Elath and have lived there to this day. Ahaz Seeks Help of Assyria