The LORD is about to deliver His children from Egypt. He has already sent nine plagues upon the Egyptians, but before the Exodus, He has one more plague to unleash on the Egyptians: the killing of their first born (Exodus 12:12, 13). Now, unlike the previous six plagues that God shielded Israel from, the Israelites would only be free from the final plague if the blood of the Passover lamb was “[struck] on the two side posts and on the upper door post of their houses” (Exodus 12: 3-7, 13). The blood was a token that absolved the Israelites from the judgment God would bring upon the Egyptians (Exodus 12:12, 13). On this solemn night, the LORD was going to pass through the land of Egypt examine every household, and smite the firstborn of those who were not covered by the blood (Exodus 12:12, 13).
At midnight the job was complete. The LORD had killed every firstborn in Egypt that was not covered. And Pharaoh rising up in the night, demands that Israel get out of his land and serve the LORD. The children of Israel, after 430 years, of sojourning Egypt are finally freed (Exodus 12:40). This night had to be remembered, so the LORD made the Passover an ordinance to be kept annually by the house of Israel (Exodus 12:42-47).
Stay tuned to see how the Passover is celebrated by king Josiah.