Exodus 6:30

And Moses said before Yahweh, - Lo! I, am of uncircumcised lips, how then will Pharaoh hearken unto me?

Exodus 6:12

And Moses spake before Yahweh, saying, - Lo! the sons of Israel have not hearkened unto me, how then shall Pharaoh, hear, I, also being of uncircumcised lips.

Exodus 4:10

And Moses said unto Yahweh - Pardon, O My Lord! not a man of words, am I, neither heretofore, nor since thou hast spoken unto thy servant, - for heavy of mouth and heavy of tongue, I am.

1 Corinthians 9:16-17

For, if I be telling the glad-message, it is, with me, no matter of boasting; for, necessity, upon me, lieth, - for it is, Woe to me, if I should not be telling the glad-message;

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