“That you may understand how the Lord makes a distinction between Egypt and Israel” (Exodus 11:7, NASB).
This statement is the conclusion of Moses’ declaration to Pharaoh before God sent the final plague, the deaths of all the firstborns, against Egypt.
A previous meditation about the plagues God sent against Egypt to convince Pharaoh to emancipate the Israelites established that what matters to God is where your allegiance falls. The Israelites couldn’t serve serve God and Pharaoh.
Steve's Bible Meditations 