19 And the magicians said to Pharao This is the finger of God. And Pharao heart was hardened, and he hearkened not unto them, as the Lord had commanded.
20 The Lord also said to Moses: Arise early, and stand before Pharao: for he will go forth to the waters: and thou shalt say to him: Thus saith the Lord: Let my people go to sacrifice to me.
21 But if thou wilt not let them go, behold I will send in upon thee, and upon thy servants, and upon thy houses all kind of flies: and the houses of the Egyptians shall be filled with flies of divers kinds, and the whole land wherein they shall be.
22 And I will make the land of Gessen wherein my people is, wonderful in that lay, so that flies shall not be there: and thou shalt know that I am the Lord in the midst of the earth.
23 And I will put a division between my people and thy people: to morrow shall this sign be.
24 And the Lord did so. And there came a very grievous swarm of flies into he houses of Pharao and of his servants, and into all the land of Egypt: and the land was corrupted by this kind of flies.
25 And Pharao called Moses and Aaron, and said to them: Go, and sacrifice to your God in this land.