2 Kings 16:5

Then Rezin, king of Syria, and Pekah, son of Remaliah, king of Israel, who had formed an alliance at the time of Jotham, 2 Kings 15:37, came up to Jerusalem to war; and they besieged Ahaz, but could not overcome him; they were unable to take the city, which had been strongly fortified by Uzziah and Jotham. Thus a prophecy of Isaiah was fulfilled, Isaiah 7:1. But while the allies did not accomplish their purpose of taking Jerusalem and embodying Judah in their mighty confederacy, they had success elsewhere.