The Lord told Moses and Aaron that this month would be the first of the year. On the tenth day each family would take a lamb without defect, a year-old male, and keep it until the fourteenth day, when the whole assembly would kill it at twilight. They would put its blood on the two doorposts and the lintel of the house, and eat the meat roasted with unleavened bread and bitter herbs, in haste, with belt fastened, sandals on and staff in hand. The Lord would pass through Egypt that night and strike every firstborn, and when he saw the blood he would pass over, with no plague of destruction.
God commanded them to keep this date as a perpetual ordinance and to celebrate the Feast of Unleavened Bread for seven days, with no leaven in their houses. Moses explained the rite to the elders: apply the blood with a bunch of hyssop and stay inside until morning. When their children asked about the rite, they were to say it was the Passover sacrifice to the Lord, who passed over the houses of Israel.
At midnight the Lord struck every firstborn of Egypt, from Pharaoh's to the prisoner's in the dungeon, and the firstborn of the livestock. There was a great cry, for there was no house without someone dead. Pharaoh summoned Moses and Aaron by night and told them to leave with all the people, with their flocks and herds, and to bless him too. The Egyptians urged the people to hurry out, and the Israelites received silver, gold and clothing from them.
The Israelites set out from Rameses to Succoth, about six hundred thousand men on foot, besides children, with a mixed multitude and many livestock. Israel's stay in Egypt had been 430 years, and that night was a night of watching for the Lord. The chapter ends with the rules of the Passover: no uncircumcised foreigner could eat it, it was to be eaten in one house and no bone of the lamb was to be broken.