isaiah 6

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 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 touched my mouth and said:

"Behold, this has touched your lips;

your guilt is taken away, and your sin atoned for."