Exodus 4:10-14
And Moses said unto the LORD, O my Lord, I[ am] not eloquent, neither heretofore, nor since thou hast spoken unto thy servant: but I[ am] slow of speech, and of a slow tongue.And the LORD said unto him, Who hath made man’s mouth? or who maketh the dumb, or deaf, or the seeing, or the blind? have not I the LORD?Now therefore go, and I will be with thy mouth, and teach thee what thou shalt say.And he said, O my Lord, send, I pray thee, by the hand[ of him whom] thou wilt send.And the anger of the LORD was kindled against Moses, and he said,[ Is] not Aaron the Levite thy brother? 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.