Exodus 4:10
And Moses said unto the LORD, O my Lord, I am not eloquent, neither before, nor since you have spoken unto your servant: but I am slow of speech, and of a slow tongue.
Exodus 6:12
And Moses spoke 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?
Jeremiah 1:6
Then said I, Ah, Lord GOD! behold, I cannot speak: for I am a child.
Exodus 4:1
And Moses answered and said, But, behold, they will not believe me, nor hearken unto my voice: for they will say, The LORD has not appeared unto you.
Acts 7:22
And Moses was learned in all the wisdom of the Egyptians, and was mighty in words and in deeds.
Job 12:2
No doubt you are the people, and wisdom shall die with you.
1 Corinthians 2:1-4
And I, brethren, when I came to you, came not with excellency of speech or of wisdom, declaring unto you the testimony of God.
2 Corinthians 10:10
For his letters, say they, are weighty and powerful; but his bodily presence is weak, and his speech contemptible.
2 Corinthians 11:6
But though I be unskilled in speech, yet not in knowledge; but we have been thoroughly made manifest among you in all things.