REDEMPTION IS MAKING A DISTINCTION BETWEEN ISRAEL AND EGYPT

Exodus 10:23 They saw not one another, neither rose any from his place for three days: but all the children of Israel had light in their dwellings.

Exodus 11:6 And there shall be a great cry throughout all the land of Egypt, such as there was none like it, nor shall be like it any more.

Exodus 11:7 But against any of the children of Israel shall not a dog move his tongue, against man or beast: that ye may know how that the LORD doth put a difference between the Egyptians and Israel.