Exodus 6:11 YLT

⁹  And Moses speaketh so unto the sons of Israel, and they hearkened not unto Moses, for anguish of spirit, and for harsh service.

¹⁰  And Jehovah speaketh unto Moses, saying,

¹¹  'Go in, speak unto Pharaoh king of Egypt, and he doth send the sons of Israel out of his land;

¹²  and Moses speaketh before Jehovah, saying, 'Lo, the sons of Israel have not hearkened unto me, and how doth Pharaoh hear me, and I of uncircumcised lips?'

¹³  And Jehovah speaketh unto Moses, and unto Aaron, and chargeth them for the sons of Israel, and for Pharaoh king of Egypt, to bring out the sons of Israel from the land of Egypt.