Isaiah 6:5-7

Revised Standard Version Catholic Edition

⁵ And I said: “Woe is me! For I am lost; for I am a man of unclean lips, and I dwell in the midst of a people of unclean lips; for my eyes have seen the King, the Lord of hosts!”

⁶ Then flew one of the seraphim to me, having in his hand a burning coal which he had taken with tongs from the altar. ⁷ And he touched my mouth, and said: “Behold, this has touched your lips; your guilt is taken away, and your sin forgiven.”