Isaiah 6:5-7

Amplified Bible, Classic Edition

⁵ Then said I, Woe is me! For I am undone and ruined, because I am a man of unclean lips, and I dwell in the midst of a people of unclean lips; for my eyes have seen the King, the Lord of hosts!

⁶ Then flew one of the seraphim [heavenly beings] to me, having a live coal in his hand which he had taken with tongs from off the altar;

⁷ And with it he touched my mouth and said, Behold, this has touched your lips; your iniquity and guilt are taken away, and your sin is completely atoned for and forgiven.