Exodus 4:1, 10-13

Then Moses answered, “What if the people of Israel do not believe me or listen to me? What if they say, ‘The LORD did not appear to you’?”

But Moses said to the LORD, “Please, Lord, I have never been a skilled speaker. Even now, after talking to you, I cannot speak well. I speak slowly and can’t find the best words.” Then the LORD said to him, “Who made a person’s mouth? And who makes someone deaf or not able to speak? Or who gives a person sight or blindness? It is I, the LORD. Now go! I will help you speak, and I will teach you what to say.” But Moses said, “Please, Lord, send someone else.”