Shemot 5:1-3

Orthodox Jewish Bible

5 And afterward Moshe and Aharon went in, and told Pharaoh, Thus saith Hashem Elohei Yisroel, Let My people go, that they may hold a chag (feast) unto Me in the midbar.

² And Pharaoh said, Who is Hashem, that I should obey His voice to let Yisroel go? I know not Hashem, neither will I let Yisroel go.

³ And they said, Elohei HaIvrim hath met with us; let us go, now, derech shloshet yamim into the midbar, and sacrifice unto Hashem Eloheinu; lest He fall upon us with dever (cattle disease), or with the cherev.