Isaiah 6:5-7

Amplified Bible

⁵ Then I said,

⁶ Then one of the seraphim flew to me with a burning coal in his hand, which he had taken from the altar with tongs. ⁷ He 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.”