Isaiah 6
5 Ref Then I said, The curse is on me, and my fate is destruction; for I am a man of unclean lips, living among a people of unclean lips; for my eyes have seen the King, the Lord of armies.
6 Ref Then a winged one came to me with a burning coal in his hand, which he had taken from off the altar with the fire-spoon.
7 Ref And after touching my mouth with it, he said, See, your lips have been touched with this; and your evil is taken away, and you are made clean from sin.
8 Ref And the voice of the Lord came to my ears, saying, Whom am I to send, and who will go for us? Then I said, Here am I, send me.