Isaiah 6:8 WEB

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!'

⁹  He said, 'Go, and tell this people, 'You hear indeed, But don't understand; And you see indeed, But don't perceive.'

¹⁰  Make the heart of this people fat; Make their ears heavy, and shut their eyes; Lest they see with their eyes, And hear with their ears, And understand with their heart, And turn again, and be healed.'