Exodus 6:30
And Moses said before LORD, Behold, I am of uncircumcised lips, and how shall Pharaoh hearken to me?
Exodus 6:12
And Moses spoke before LORD, saying, Behold, the sons of Israel have not hearkened to me, how then shall Pharaoh hear me, who am of uncircumcised lips?
Exodus 4:10
And Moses said to LORD, Oh, LORD, I am not eloquent, neither heretofore, nor since thou have spoken to thy servant, for I am slow of speech, and of a slow tongue.
1 Corinthians 9:16-17
For if I preach the good-news, it is not a source of pride for me, for an obligation is laid upon me. And woe is to me if I do not preach the good-news.
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