Exodus 4:10
King James Version
“And Moses said unto the LORD, O my Lord, I not eloquent, neither heretofore, nor since thou hast spoken unto thy servant: but I slow of speech, and of a slow tongue.”
Context
7And he said, Put thine hand into thy bosom again. And he put his hand into his bosom again; and plucked it out of his bosom, and, behold, it was turned again as his flesh.
8And it shall come to pass, if they will not believe thee, neither hearken to the voice of the first sign, that they will believe the voice of the latter sign.
9And it shall come to pass, if they will not believe also these two signs, neither hearken unto thy voice, that thou shalt take of the water of the river, and pour upon the dry and the water which thou takest out of the river shall become blood upon the dry
10And Moses said unto the LORD, O my Lord, I not eloquent, neither heretofore, nor since thou hast spoken unto thy servant: but I slow of speech, and of a slow tongue.
11And 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?
12Now therefore go, and I will be with thy mouth, and teach thee what thou shalt say.
13And he said, O my Lord, send, I pray thee, by the hand thou wilt send.