Exodus 10:29 YLT

²⁷  And Jehovah strengtheneth the heart of Pharaoh, and he hath not been willing to send them away;

²⁸  and Pharaoh saith to him, 'Go from me, take heed to thyself, add not to see my face, for in the day thou seest my face thou diest;'

²⁹  and Moses saith, 'Rightly hast thou spoken, I add not any more to see thy face.'