2 Kings 16:5
3 He followed in the footsteps of the kings of Israel. He passed his son through the fire, a horrible sin practiced by the nations whom the Lord drove out from before the Israelites. 4 He offered sacrifices and burned incense on the high places, on the hills, and under every green tree. 5 At that time King Rezin of Syria and King Pekah son of Remaliah of Israel attacked Jerusalem. They besieged Ahaz, but were unable to conquer him. 6 (At that time King Rezin of Syria recovered Elat for Syria; he drove the Judahites from there. Syrians arrived in Elat and live there to this very day.) 7 Ahaz sent messengers to King Tiglath-Pileser of Assyria, saying, “I am your servant and your dependent. March up and rescue me from the power of the king of Syria and the king of Israel, who have attacked me.”
2 Chronicles 28:5
1 Ahaz was twenty years old when he began to reign, and he reigned for sixteen years in Jerusalem. He did not do what pleased the Lord, in contrast to his ancestor David. 2 He followed in the footsteps of the kings of Israel; he also made images of the Baals. 3 He offered sacrifices in the Valley of Ben Hinnom and passed his sons through the fire, a horrible sin practiced by the nations whom the Lord drove out before the Israelites. 4 He offered sacrifices and burned incense on the high places, on the hills, and under every green tree. 5 The Lord his God handed him over to the king of Syria. The Syrians defeated him and deported many captives to Damascus. He was also handed over to the king of Israel, who thoroughly defeated him.
Notes and References
"... In 2 Kings 16:5 the writer described what has become known in scholarship as the Syro-Ephraimite war. According to this theory, Rezin the king of Syria (Aram) and Pekah the king of north Israel invaded Judah and besieged Jerusalem, apparently in an attempt to force Abaz into an anti-Assyrian alliance (compare Isaiah 7; Hosea 5:8-15). Despite being urged by Isaiah to ignore the northern attackers and put his faith in Yahweh for deliverance, Ahaz sent a bribe to Tiglath-Pileser III, who campaigned through the land in 734-732 BCE and transformed most of north Israel and the Aramean state into Assyrian provinces. The Chronicler's account of this war is so different from chat in Kings that a number of scholars (e.g., Rudolph, 291) have concluded that he was describing an otherwise unknown event and identifying it with the Syro-Ephraimite war. In the Chronicler's account, the two northern nations attacked separately ..."
Klein, Ralph W. 2 Chronicles: A Commentary (p. 393) Fortress Press, 2012