Moses and Aaron caused the land to be filled with flies

20 Then Yahweh said to Moses/me, “Get up early tomorrow morning. Go down to the river and wait for the king. When he comes to bathe [MTY], say to him, ‘This is what Yahweh says to you: “Let my people go, in order that they may worship me in the desert. 21 I warn you that if you do not let my people go, I will send swarms of flies to you. They will come down on you and on your officials and on the rest of your people. The houses of all you Egyptians will be full of flies. They will even cover the ground. 22 But when that happens, I will treat the Goshen region, where my people live, differently. There will be no swarms of flies there. In that way, you will know that I, Yahweh, am doing these things here in this land. 23 I will distinguish clearly between how I act toward my people and how I act toward your people. And this plague is going to happen tomorrow!” ’ ”

24 Early the next morning, Moses/I told that to the king, but the king would not pay any attention. So Yahweh did what he said he would do. He sent great swarms of flies into the palace of the king and into the houses of his officials. The whole country of Egypt was ruined by the flies. 25 Then the king summoned Aaron and Moses/me and said, “You Israeli people can go and offer sacrifices to your god, but you must do it here in this land.” 26 But Moses/I replied, “It would not be right for us to do that, because we will be offering sacrifices that are very offensive to the Egyptian people. If we offer sacrifices that the Egyptian people think are disgusting, they will kill us by throwing stones at us [RHQ]! 27 No, we need to travel for three days into the desert. There we will offer sacrifices to Yahweh, the God we worship, just as he commands (OR, has commanded) us.” 28 So the king said, “I will let your people go to offer sacrifices to Yahweh, your god, in the desert. But you must not go very far. Now pray for me!” 29 Moses/I said, “Listen to me! After I leave you, I will pray to Yahweh, asking that tomorrow he will cause the swarms of flies to leave you and your officials and the rest of your people. But do not deceive us again by refusing to let our people go to offer sacrifices to Yahweh!”

30 Then Moses/I left the king and prayed to Yahweh. 31 And Yahweh did what Moses/I asked, and he got rid of the swarms of flies from around the king and his officials and the rest of his people. No flies remained. 32 But the king was stubborn [IDM] this time also, and he did not allow the Israeli people to go.