But the Lord proposed to break the hard heart of Pharaoh. He told Moses to see that every Israelite should take a lamb from the flock and keep it four days. Then, at evening, he was to kill it, and dip a branch of hyssop in its blood, and strike it against the sides of his door, also over it, leaving three marks of blood there. Then he was to close his door and no one was to go out of it until morning.
They were to roast the lamb and eat of it, and be ready for the journey they were to make, and it should be to them forever the feast called the Passover. They were to eat it with unleavened bread, and the feast should be kept forever from the first to the seventh day of the month, a holy feast to the Lord.
And this is why it was called the feast of the Passover. At midnight, after the lamb was killed in each house of the Israelites, and the doors were shut, the Lord passed through the land, and wherever he saw the blood on the side posts and the top of the door, he passed over that house, and it was safe, but in every Egyptian house the first born died, from the child of Pharaoh who sat on the throne, to the child of the captive in the cell, and all the first born of cattle.
The next morning a great cry went up from the land of Egypt, for there was not a house where there was not one dead.
Then Pharaoh was quite ready to let the Israelites go.
"Take all you have and be gone," he said.
They were all ready, and rose up very gladly to join the great procession, led by Moses and Aaron, that gathered in Goshen, and started on its long journey toward the east.
They had heard of the land of their fathers, and now they were going home to be slaves no more. They were a family of seventy souls when they came into Egypt, four hundred and thirty years before, and now they went out a great nation, as the Lord had promised when he blessed their fathers.
The feast of the Passover has been the chief one held by the Israelites, from the time of their coming out of Egypt until now, and since Jesus held the Passover feast with his disciples on the night that he went forth to death, it has become to all Christians the Sacrament of the Lord's Supper.