And Moses said to the LORD, O my LORD, I am not eloquent, neither heretofore, nor since you have spoken to your servant: but I am slow of speech, and of a slow tongue.
And Moses spoke before the LORD, saying, Behold, the children of Israel have not listened to me; how then shall Pharaoh hear me, who am of uncircumcised lips?
Then said I, Woe is me! for I am undone; because I am a man of unclean lips, and I dwell in the middle of a people of unclean lips: for my eyes have seen the King, the LORD of hosts.