He offered sacrifices and burned incense at the high places, on the hilltops and under every spreading tree.
Therefore the LORD his God handed him over to the king of Aram.1 The Arameans defeated him and took many of his people as prisoners and brought them to Damascus. He was also given into the hands of the king of Israel, who inflicted heavy casualties on him.
References for 2 Chronicles 28:5
In one day Pekah2 son of Remaliah killed a hundred and twenty thousand soldiers in Judah3--because Judah had forsaken the LORD, the God of their fathers.
References for 2 Chronicles 28:6