They will fill your houses and the houses of your servants and of all the Egyptians—something your parents and your grandparents have not seen from the day they appeared on this soil until today.” With that he turned and left Pharaoh.
This the Lord did. Thick swarms of flies entered the house of Pharaoh and the houses of his servants; throughout Egypt the land was devastated on account of the swarms of flies.
But Moses replied, “It is not right to do so, for what we sacrifice to the Lord, our God, is abhorrent to the Egyptians. If we sacrifice what is abhorrent to the Egyptians before their very eyes, will they not stone us?