And Moses answered and said, And, behold, they will not believe me and will not listen to my voice. For they will say, Jehovah has not appeared to you.
And Moses said to Jehovah, O Lord, I am not a man of words, either from yesterday or the third day, or since You have been speaking to Your bondslave. For I am heavy of mouth and heavy of tongue.
And Moses spoke before Jehovah, saying, Behold the sons of Israel have not listened to me. And how should Pharaoh hear me, I being of uncircumcised lips?
Then I said, Woe to me! For I am cut off; for I am a man of unclean lips, and I live amongst a people of unclean lips; for my eyes have seen the King, Jehovah of Hosts.