Exodus 8:19-21

Revised Standard Version Catholic Edition

¹⁹ And the magicians said to Pharaoh, “This is the finger of God.” But Pharaoh’s heart was hardened, and he would not listen to them; as the Lord had said.

The Fourth Plague: Flies

²⁰ Then the Lord said to Moses, “Rise up early in the morning and wait for Pharaoh, as he goes out to the water, and say to him, ‘Thus says the Lord, “Let my people go, that they may serve me. ²¹ Else, if you will not let my people go, behold, I will send swarms of flies on you and your servants and your people, and into your houses; and the houses of the Egyptians shall be filled with swarms of flies, and also the ground on which they stand.