How sweet to observe the tokens of distinguishing grace! See that scripture, Malachi 3:17-18. Hence from this conviction David sung, Psalms 27:5-6. And what will be the final discrimination of the righteous from the wicked? See the words of the Lord Jesus on that point: Matthew 25:31-41.
Related Commentaries of Exodus 8:22
Exodus 8:22-23
22 And I will sever in that day the land of Goshen, in which my people dwell, that no swarms of flies shall be there; to the end thou mayest know that I am the LORD in the midst of the earth.
23 And I will put a divisione between my people and thy people: to morrow shall this sign be.