Exodus 4:10-14
And Moses said unto Jehovah, Oh, Lord, I am not eloquent, neither heretofore, nor since thou hast spoken unto thy servant; for I am slow of speech, and of a slow tongue.And Jehovah said unto him, Who hath made man’s mouth? Or who maketh a man dumb, or deaf, or seeing, or blind? Is it not I, Jehovah?Now therefore go, and I will be with thy mouth, and teach thee what thou shalt speak.And he said, Oh, Lord, send, I pray thee, by the hand of him whom thou wilt send.And the anger of Jehovah was kindled against Moses, and he said, Is there not Aaron thy brother the Levite? I know that he can speak well. And also, behold, he cometh forth to meet thee: and when he seeth thee, he will be glad in his heart.