Exodus 4:10-14

10But Moses replied to the Lord, “Please, Lord, I have never been eloquent — either in the past or recently or since you have been speaking to your servant — because my mouth and my tongue are sluggish.”

11The Lord said to him, “Who placed a mouth on humans? Who makes a person mute or deaf, seeing or blind? Is it not I, the Lord?

12Now go! I will help you speak and I will teach you what to say.”

13Moses said, “Please, Lord, send someone else.”

14Then the Lord’s anger burned against Moses, and he said, “Isn’t Aaron the Levite your brother? I know that he can speak well. And also, he is on his way now to meet you. He will rejoice when he sees you.