Exodus 4:10-13 American Standard Version (ASV)

10. 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.

11. 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?

12. Now therefore go, and I will be with thy mouth, and teach thee what thou shalt speak.

13. And he said, Oh, Lord, send, I pray thee, by the hand of him whom thou wilt send.

Exodus 4