Exodus 10:25-27

Amplified Bible

²⁵ But Moses said, “You must also let us have sacrifices and burnt offerings, so that we may sacrifice them to the Lord our God. ²⁶ Therefore, our livestock must also go with us; not one hoof shall be left behind, for we must take some of them to serve the Lord our God. Even we do not know with what we will serve the Lord until we arrive there.” ²⁷ But the Lord hardened Pharaoh’s heart, and he was not willing to let them go.