'Unskilled' in the Bible

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?”

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

But even if I am unskilled in speech, yet I am not so in knowledge; in fact, in every way we have made this evident to you in all things.