Isaiah 6:1-8

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. Then one of the seraphim flew to me, and in his hand was a glowing coal that he had taken from the altar  with tongs. He touched my mouth  with it and said: Now that this has touched your lips, your iniquity is removed and your sin is atoned for.  Then I heard the voice of the Lord asking: Who will I send? Who will go for us?