take the coal and cleanse ma lips, oh LORD...

5 "Woe to me!" I cried. "I am ruined! For I am a man of unclean lips, and I live among a people of unclean lips, and my eyes have seen the King, the LORD Almighty."

6 Then one of the seraphs flew to me with a live coal in his hand, which he had taken with thongs from the altar. 7 With it he touched my mouth and said, "See, this has touched your lips; your guilt is taken away and your sin atoned for."

Isaiah 6:5-6 (NIV)