Look at this map. It shows the entire Exodus — the whole journey from Egypt to the edge of Canaan — in a single image. Find Goshen and Rameses in the upper-left. Find Canaan in the upper-right. The dotted line between them traces forty years of the most formative journey in the history of any nation on earth. It all began with one night.
The Passover was the culmination of ten plagues and the birthday of a nation. God's instructions to Moses were precise: on the tenth of the month of Abib, each household was to take an unblemished lamb, keep it for four days, then slaughter it at twilight. The blood was to be applied to the two doorposts and the lintel of the house — not hidden, not subtle, but visibly marked. The lamb was to be roasted whole and eaten that night, with unleavened bread and bitter herbs, fully dressed and ready to travel. "It is the LORD's passover," God declared. "For I will pass through the land of Egypt this night, and will smite all the firstborn in Egypt... and when I see the blood, I will pass over you" (Exodus 12:11–13).
At midnight, God passed through Egypt. Every firstborn died — from Pharaoh's son on his throne to the prisoner's son in the dungeon, to the firstborn of the livestock. Egypt woke to a nation of the dead. Pharaoh called Moses and Aaron in the night and said: get out. And Israel rose up — find Rameses on the map — and walked out of Egypt before dawn, after 430 years to the very day (Exodus 12:41).
They left in such haste that the bread had no time to rise. They asked their Egyptian neighbors for silver, gold, and clothing — and received it. "The LORD gave the people favour in the sight of the Egyptians, so that they lent unto them such things as they required: and they spoiled the Egyptians" (Exodus 12:36). The wealth of Egypt transferred to the departing slaves in a single night. Follow the dotted line on the map southward from Rameses — this is the road of the greatest deliverance in human history, and it began with the blood of a lamb on a doorpost.