According to 2 Kings 18, while Sennacherib was besieging Lachish, he received a message from Hezekiah offering to pay tribute in exchange for Assyrian withdrawal. According to the Hebrew Bible, Hezekiah paid 300 talents of silver and 30 talents of gold to Assyria—a price so heavy that he was forced to empty the temple and royal treasury of silver and strip the gold from the doorposts of Solomon's temple. Nevertheless, Sennacherib marched on Jerusalem with a large army. When the Assyrian force arrived, its field commander Rabshakeh brought a message from Sennacherib. In an attempt to demoralize the Judeans, the field commander announced to the people on the city walls that Hezekiah was deceiving them, and that Yahweh could not deliver Jerusalem from the king of Assyria. He listed the gods of other peoples defeated by Sennacherib then asked, "Who of all the gods of these countries has been able to save his land from me?" During the siege, Hezekiah dressed in sackcloth (a sign of mourning), but the prophet Isaiah assured him that the city would be delivered and Sennacherib would fail. Overnight, an angel killed 185,000 Assyrian troops. Some scholars believe this number has been transcribed incorrectly, with one study suggesting the number was originally 5,180. Sennacherib's Prism, which details the events of Sennacherib's campaign against Judah, was discovered in the ruins of Nineveh in 1830, and is now stored at the Oriental Institute in Chicago, Illinois. The account dates from about 690 BCE. The text of the prism boasts how Sennacherib destroyed 46 of Judah's cities and trapped Hezekiah in Jerusalem "like a caged bird." The text goes on to describe how the "terrifying splendor" of the Assyrian army caused the Arabs and mercenaries reinforcing the city to desert. It adds that the Assyrian king returned to Assyria where he later received a large tribute from Judah. This description inevitably varies somewhat from the Jewish version in the Tanakh. The massive Assyrian casualties mentioned in the Tanakh are not mentioned in the Assyrian version. After he besieged Jerusalem, Sennacherib was able to give the surrounding towns to Assyrian vassal rulers in Ekron, Gaza and Ashdod. His army still existed when he conducted campaigns in 702 BCE and from 699 BCE until 697 BCE, when he made several campaigns in the mountains east of Assyria, during one of which he received tribute from the Medes.