Isaiah 6:6-8

6Then one of the seraphim flew to me with a burning coal in his hand, which he had taken from the altar with tongs.

7He touched my mouth with it and said, “Listen carefully, this has touched your lips; your wickedness [your sin, your injustice, your wrongdoing] is taken away and your sin atoned for and forgiven.”

8Then I heard the voice of the Lord, saying, “Whom shall I send, and who will go for Us?” Then I said, “Here am I. Send me!”