Isaiah 6:5-8 New King James Version
“Woe is me, for I am undone!
Because 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,
6 Then one of the seraphim flew to me, having in his hand a live coal which he had taken with the tongs from the altar. 7 And he touched my mouth with it, and said:
“Behold, this has touched your lips;
Your iniquity is taken away,
8 Also I heard the voice of the Lord, saying:
Then I said, “Here am I! Send me.”