Isaiah 6:5–7

Isaiah knows his lips are unclean, and a coal from the altar cleanses them

5And I said, “Woe to me! For I am lost; for I am a man of unclean lips, and in the midst of a people of unclean lips I dwell; for the King, YHWH Tsevaot, my eyes have seen.”

6Then one of the seraphim flew to me, and in his hand was a burning coal that he had taken with tongs from on the altar.

7And he touched my mouth and said, “Look, this has touched your lips, and your iniquity is taken away, and your sin is expiated.”

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3And one called to another and said, “Holy, holy, holy is YHWH Tsevaot; the fullness of all the earth is his glory.”

4And the pivots of the thresholds shook at the voice of the one who called, and the house was filling with smoke.

…

8And I heard the voice of Adonai saying, “Whom shall I send, and who will go for us?” And I said, “Here I am; send me.”

9And he said, “Go, and say to this people, ‘Keep hearing, but do not understand; keep seeing, but do not know.’

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Turning back to GodThe Tongue