During the lifetime of King Pekah of Israel, King Tiglath-pileser of Assyria attacked. He captured the cities of Ijon, Abel Beth Maacah, Janoah, Kedesh, and Hazor. He also captured Gilead, Galilee, and the entire territory of Naphtali, and carried its people off to Assyria.

So Ahaz sent envoys to Tiglath-pileser, king of Assyria, to tell him, "I am your servant and son. Save me from the king of Aram and the king of Israel, who are attacking me."

King Ahaz traveled to Damascus and met with King Tiglath-pileser of Assyria, where he observed the altar at Damascus. So King Ahaz sent a set of construction patterns of this altar to Uriah the priest.