2 Kings 16:1-5 NIV
In the seventeenth year of Pekah son of Remaliah, Ahaz son of Jotham king of Judah began to reign. Ahaz was twenty years old when he became king, and he reigned in Jerusalem sixteen years. Unlike David his father, he did not do what was right in the eyes of the LORD his God. He followed the ways of the kings of Israel and even sacrificed his son in the fire, engaging in the detestable practices of the nations the LORD had driven out before the Israelites. He offered sacrifices and burned incense at the high places, on the hilltops and under every spreading tree.
Then Rezin king of Aram and Pekah son of Remaliah king of Israel marched up to fight against Jerusalem and besieged Ahaz, but they could not overpower him.
NIV: New International Version