Isaiah 6:7 in the King James Version
And he laid it upon my mouth, and said, Lo, this hath touched thy lips; and thine iniquity is taken away, and thy sin purged.
Context
6 Then one of the seraphim flew to me, having a live coal in his hand, which he had taken with the tongs from off the altar.
7 He touched my mouth with it, and said, “Behold, this has touched your lips; and your iniquity is taken away, and your sin forgiven.”
8 I heard the Lord’s voice, saying, “Whom shall I send, and who will go for us?” Then I said, “Here I am. Send me!”