Isaiah 6:4-6

New Revised Standard Version Catholic Edition

⁴ The pivots^[a] on the thresholds shook at the voices of those who called, and the house filled with smoke. ⁵ And I said: “Woe is me! I am lost, for I am a man of unclean lips, and I live among a people of unclean lips; yet my eyes have seen the King, the Lord of hosts!”

⁶ Then one of the seraphs flew to me, holding a live coal that had been taken from the altar with a pair of tongs.