Exodus 6:30

But Moses said to the LORD, "Behold, I am of uncircumcised lips. How will Pharaoh listen to me?"

Exodus 6:12

But Moses said to the LORD, "Behold, the people of Israel have not listened to me. How then shall Pharaoh listen to me, for I am of uncircumcised lips?"

Exodus 4:10

But Moses said to the LORD, "Oh, my Lord, I am not eloquent, either in the past or since you have spoken to your servant, but I am slow of speech and of tongue."

1 Corinthians 9:16-17

For if I preach the gospel, that gives me no ground for boasting. For necessity is laid upon me. Woe to me if I do not preach the gospel!

Treasury of Scripture Knowledge did not add