Exodus 6:30

But Moses said before the Lord, “Behold, I am unskilled in speech; how then will Pharaoh listen to me?”

Exodus 6:12

But Moses spoke before the Lord, saying, “Behold, the sons of Israel have not listened to me; how then will Pharaoh listen to me, for I am unskilled in speech?”

Exodus 4:10

Then Moses said to the Lord, “Please, Lord, I have never been eloquent, neither recently nor in time past, nor since You have spoken to Your servant; for I am slow of speech and slow of tongue.”

1 Corinthians 9:16-17

For if I preach the gospel, I have nothing to boast of, for I am under compulsion; for woe is me if I do not preach the gospel.

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