Exodus 8:26-28

But Moses said, “It wouldn’t be right to do that, because the Egyptians hate the sacrifices we offer to the LORD our God. If they see us offering sacrifices they hate, they will throw stones at us and kill us. Let us make a three-day journey into the desert. We must offer sacrifices to the LORD our God there, as the LORD told us to do.” The king said, “I will let you go so that you may offer sacrifices to the LORD your God in the desert, but you must not go very far away. Now go and pray for me.”