21. For, if thou do not let my people go, behold, I will send dog-flies upon thee, and upon thy bondmen, and upon thy people, and into thy houses; and the houses of the Egyptians shall be full of dog-flies, and also the ground on which they are.
22. And I will distinguish in that day the land of Goshen, in which my people dwell, that no dog-flies shall be there; that thou mayest know that I Jehovah am in the midst of the land.
23. And I will put a separation between my people and thy people; to-morrow shall this sign be.
24. And Jehovah did so; and there came dog-flies in a multitude into the house of Pharaoh, and into the houses of his bondmen; and throughout the land of Egypt, the land was corrupted by the dog-flies.
25. And Pharaoh called Moses and Aaron, and said, Go, sacrifice to your God in the land.
26. And Moses said, It is not proper to do so; for we should sacrifice the abomination of the Egyptians to Jehovah our God lo, if we sacrificed the abomination of the Egyptians before their eyes, would they not stone us?