And Moses said to the Lord, O Lord, I am not a man of words; I have never been so, and am not now, even after what you have said to your servant: for talking is hard for me, and I am slow of tongue.
And Moses, answering the Lord, said, See, the children of Israel will not give ear to me; how then will Pharaoh give ear to me, whose lips are unclean?
Then I said, The curse is on me, and my fate is destruction; for I am a man of unclean lips, living among a people of unclean lips; for my eyes have seen the King, the Lord of armies.