Isaiah 6:1-5

In the year that King Uzziah died, I saw the Lord seated on a high and lofty throne, and the hem of his robe filled the temple. Seraphim were standing above him; they each had six wings: with two they covered their faces, with two they covered their feet, and with two they flew. And one called to another: Holy, holy, holy is the LORD of Armies; his glory fills the whole earth. The foundations of the doorways shook at the sound of their voices, and the temple was filled with smoke. Then I said: Woe is me for I am ruined because I am a man of unclean lips and live among a people of unclean lips, and because my eyes have seen the King, the LORD of Armies.