“Then King Rezin of Aram and King Pekah son of Remaliah of Israel came up to wage war on Jerusalem. They besieged King Ahaz but could not conquer him. At that time the king of Edom recovered Elath for Edom. He drove the Judeans from Elath. The Edomites came to Elath, where they live to this day. So King Ahaz sent messengers to King Tiglath-pileser of Assyria, saying. ‘I am your servant and your son. Come up. Rescue me from the hand of the king of Aram and from the hand of the king of Israel, who are attacking me.’ King Ahaz also took the silver and gold found in the house of Yahweh and in the treasures of the king’s house, and sent a present to the king of Assyria. The king of Assyria listened to him. The king of Assyria marched up against Damascus, and took it. He carried its people captive to Kir. Then he killed King Rezin.”
King Rezin was the last king of Aram in Damascus before King Tiglath-pileser III of Assyria took over Damascus, killed him, and sent his people into exile in Kir. King Rezin joined with King Pekah of Israel to attack Jerusalem. They were unsuccessful because King Ahaz of Judah formed a coalition with the Assyrian King Tiglath-pileser III. King Ahaz said he would be his servant and sent a present to the king to become a vassal and get protection. So King Tiglath-pileser III was happy to get the money since he was planning to attack Damascus anyway.