But the Egyptian magicians did the same things by doing their magic tricks. So Pharaoh became stubborn. He wouldn’t listen to Moses and Aaron, just as the Lord had said.
“ ‘ “But on that day I will treat the area of Goshen differently from yours. That is where my people live. There will not be large numbers of flies in Goshen. Then you will know that I, the Lord, am in this land.
Then once again you will see the difference between godly people and sinful people. And you will see the difference between those who serve me and those who do not.