Exodus 8:23-25

Wycliffe Bible

²³ and I shall set parting betwixt my people and thy people; this sign shall be tomorrow (this miracle shall come tomorrow).

²⁴ And the Lord did so. And a most grievous fly, that is, (a) multitude of flies, came into the house of Pharaoh, and into the houses of his servants, and into all the land of Egypt; and the land was corrupted of such flies (and the land was ruined by such a multitude of flies).

²⁵ And Pharaoh called (for) Moses and Aaron, and said to them, Go ye, make ye sacrifice to the Lord your God, in this land (Go ye, and offer your sacrifices to the Lord your God, here in this land).