So Ahaz sent messengers to Tiglath-pileser king of Assyria, saying, “I am your servant and your son. Come up and save me from the hands of the kings of Aram and Israel, who are rising up against me.”
Here is, 1. The attempt of his confederate neighbours, the kings of Syria and Israel, upon him. They thought to make themselves masters of Jerusalem, and to set a king of their own in it, Isa 7:6. In this they fell short, but the king of Syria recovered Elath, a considerable port upon the Red Sea, which Amaziah had taken from the Syrians, Kg2 14:22.
Commenting on 2 Kings 16:5-9
And Ahaz took the silver and gold that was found in the house of the Lord,.... Which Uzziah and Jotham had put there; for all that was found there in the times of Amaziah was taken away by Jehoash king of Israel, Kg2 14:14.
So Ahaz sent messengers to Tiglath-pileser--In spite of the assurance given him by Isaiah by two signs, the one immediate, the other remote (Isa 7:14; Isa 8:4), that the confederate kings would not prevail against him, Ahaz sought aid from the Assyrian monarch, to purchase which he sent the treasures of the palace and temple.