Exodus 5:2-4 Young's Literal Translation (YLT)
2 and Pharaoh saith, `Who [is] Jehovah, that I hearken to His voice, to send Israel away? I have not known Jehovah, and Israel also I do not send away.'
3 And they say, `The God of the Hebrews hath met with us, let us go, we pray thee, a journey of three days into the wilderness, and we sacrifice to Jehovah our God, lest He meet us with pestilence or with sword.'
4 And the king of Egypt saith unto them, `Why, Moses and Aaron, do ye free the people from its works? go to your burdens.'