Exodus 4:10
And Moses said unto the LORD, "O my Lord. I am not eloquent, no not in times past and namely since thou hast spoken unto thy servant: but I am slow mouthed and slow tongued."
Exodus 6:12
And Moses spake before the LORD saying, "Behold, the children of Israel hearken not unto me; how then shall Pharaoh hear me, seeing that I have uncircumcised lips?"
Jeremiah 1:6
Then said I, "Oh LORD God, I cannot speak, for I am yet but young."
Exodus 4:1
Moses answered and said, "See, they will not believe me nor hearken unto my voice: but will say, 'the LORD hath not appeared unto thee.'"
Acts 7:22
And Moses was learned in all manner wisdom of the Egyptians, and was mighty in deeds and in words.
Job 12:2
"Then, no doubt, ye are the men alone; and wisdom shall perish with you.
1 Corinthians 2:1-4
And I, brethren, when I came to you, came not in gloriousness of words or of wisdom, showing unto you the testimony of God.
2 Corinthians 10:10
"For the epistles," saith he, "are sore and strong: but his bodily presence is weak, and his speech homely."
2 Corinthians 11:6
Though I be rude in speaking, yet I am not so in knowledge. Howbeit, among you we are known to the utmost what we are in all things.