Because King Ahaz sinned, the Lord his God let the king of Syria defeat him and take a large number of Judeans back to Damascus as prisoners. The Lord also let the king of Israel, Pekah son of Remaliah, defeat Ahaz and kill 120,000 of the bravest Judean soldiers in one day. The Lord, the God of their ancestors, permitted this to happen, because the people of Judah had abandoned him. 1
References for 2 Chronicles 28:5
28.5, 6 2 K 16.5; Is 7.1.