Exodus 4:10-12

Young's Literal Translation

¹⁰ And Moses saith unto Jehovah, `O, my Lord, I [am] not a man of words, either yesterday, or before, or since Thy speaking unto Thy servant, for I [am] slow of mouth, and slow of tongue.'

¹¹ And Jehovah saith unto him, `Who appointed a mouth for man? or who appointeth the dumb, or deaf, or open, or blind? is it not I, Jehovah?

¹² and now, go, and I -- I am with thy mouth, and have directed thee that which thou speakest;'