Isaiah 6:5

Then said I, Ah, Lord GOD! behold, I cannot speak: for I am a child.

And Moses said before the LORD, Behold, I am of uncircumcised lips, and how shall Pharaoh hearken unto me?

Wherefore the Lord said, Forasmuch as this people draw near me with their mouth, and with their lips do honour me, but have removed their heart far from me, and their fear toward me is taught by the precept of men:

And Moses said unto the LORD, O my LORD, I am not eloquent, neither heretofore, nor since thou hast spoken unto thy servant: but I am slow of speech, and of a slow tongue.

And Moses spake before the LORD, saying, Behold, the children of Israel have not hearkened unto me; how then shall Pharaoh hear me, who am of uncircumcised lips?

And they come unto thee as the people cometh, and they sit before thee as my people, and they hear thy words, but they will not do them: for with their mouth they shew much love, but their heart goeth after their covetousness.

And when Gideon perceived that he was an angel of the LORD, Gideon said, Alas, O LORD God! for because I have seen an angel of the LORD face to face.

And he said, Thou canst not see my face: for there shall no man see me, and live.

And Manoah said unto his wife, We shall surely die, because we have seen God.

Thine eyes shall see the king in his beauty: they shall behold the land that is very far off.

And I will make drunk her princes, and her wise men, her captains, and her rulers, and her mighty men: and they shall sleep a perpetual sleep, and not wake, saith the King, whose name is the LORD of hosts.