Isaiah 6:5–7

5 And I said: “Woe is me! yFor I am lost; zfor 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 aKing, the Lord of hosts!”

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