Acts 7:22

Moses was educated in all the culture of the Egyptians, and was a mighty man in speech and action.

1 Corinthians 2:1-4

Now when I came to you, brothers, I did not come and tell you God's uncovered secret in rhetorical language or human philosophy,

2 Corinthians 10:10

For they say, "His letters are impressive and forceful, but his physical personality is unimpressive, and his delivery is perfectly contemptible."

2 Corinthians 11:6

Although I am untrained as an orator, yet I am not so in the field of knowledge. Surely, I have always made that perfectly clear to you.

Treasury of Scripture Knowledge

Summary

And Moses said unto the LORD, O my Lord, I am not eloquent, neither heretofore, nor since thou hast spoken unto thy servant: but I am slow of speech, and of a slow tongue.

Bible References

Eloquent

1 Corinthians 2:1
Now when I came to you, brothers, I did not come and tell you God's uncovered secret in rhetorical language or human philosophy,
2 Corinthians 10:10
For they say, "His letters are impressive and forceful, but his physical personality is unimpressive, and his delivery is perfectly contemptible."
2 Corinthians 11:6
Although I am untrained as an orator, yet I am not so in the field of knowledge. Surely, I have always made that perfectly clear to you.