“But the blood on your doorposts will serve as a sign, marking the houses where you are staying. When I see the blood, I will pass over you. This plague of death will not touch you when I strike the land of Egypt. This is a day to remember. Each year, from generation to generation, you must celebrate it as a special festival to the LORD. This is a law for all time.”
- Exodus 12:13-14 (NLT)