... take the coal, touch my lips, here I am...
1In the year that King Uzziah died, I saw the Lord seated on a throne, high and exalted, and the train of his robe filled the temple. 2Above him were seraphs, each with six wings: With two wings they covered their faces, with two they covered their feet, and with two they were flying. 3And they were calling to one another:
“Holy, holy, holy is the Lord Almighty;
the whole earth is full of his glory.”
4At the sound of their voices the doorposts and thresholds shook and the temple was filled with smoke.
5“Woe to me!” I cried. “I am ruined! For I am a man of unclean lips, and I live among a people of unclean lips, and my eyes have seen the King, the Lord Almighty.”
6Then one of the seraphs flew to me with a live coal in his hand, which he had taken with tongs from the altar. 7With it he touched my mouth and said, “See, this has touched your lips; your guilt is taken away and your sin atoned for.”
8Then I heard the voice of the Lord saying, “Whom shall I send? And who will go for us?”
And I said, “Here am I. Send me!”
Isaiah 6: 1-6