Isaiah 33:20

Look upon Zion... — The words sound like an echo of Psalms 46, 48, which were probably written by the sons of Korah on the destruction of Sennacherib’s army. Men had seen Zion desecrated by Ahaz, besieged by Sennacherib; now they should see it once again as it had been at the beginning of Hezekiah’s reign, emphatically a “city of solemnities,” a tent that shall not be removed, the latter words probably referring to Sennacherib’s threat of deportation (Isaiah 36:17).