Then said I, Woe is me! for I am undone; 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.
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Cassiodorus Senator
AD 585
We must especially follow the commandments, and signing our lips with the seal of the cross we must pray to the Lord that he may cleanse our mouths, which are disfigured with human foulness.