聖經錯謬補遺

The first group stationed itself on the mount of the Temple, the second group in the "ḥel," the space between the Temple wall and the Temple hall, while the third group remained in the Temple court, thus awaiting the evening, when they took their lambs home and roasted them on a spit of pomegranate-wood. No bones might be broken either during the cooking or during the eating. The lamb was set on the table at the evening banquet (see Seder), and was eaten by the assembled company after all had satisfied their appetites with the ḥagigah or other food. The sacrifice had to be consumed entirely that same evening, nothing being allowed to remain overnight. While eating it, the entire company of those who partook was obliged to remain together, and every participant had to take a piece of the lamb at least as large as an olive. Women and girls also might take part in the banquet and eat of the sacrifice. The following benediction was pronounced before eating the lamb: "Blessed be Thou, the Eternal, our God, the King of the world, who hast sanctified us by Thy commands, and hast ordained that we should eat the Passover." The "Hallel" was recited during the meal, and when the lamb had been eaten the meaning of the custom was explained, and the story of the Exodus was told (see Seder).

http://www.lsmchinese.org/cgi-bin/bible365/guide/lamb.htm

The whole of the lamb must be consumed — head, feet, and entrails — and if any thing remain of it until morning it must be burned with fire. The Israelites are commanded to eat the meal in haste, with girded loins, shoes on their feet, and staves in their hands "for it is the Phase (that is, Passage) of the Lord." The blood of the lamb on the doorposts served as a sign of immunity or protection against the destroying hand of the Lord, who smote in one night all the first-born in the land of Egypt, both man and beast. This ordinance is repeated in abridged form in Numbers 19:11-12, and again in Deuteronomy, xvi, 2-6, where sheep and oxen are mentioned instead of the lamb.

That the Paschal Lamb prefigured symbolically Christ, "the Lamb of God", who redeemed the world by the shedding of His blood, and particularly the Eucharistic banquet, or new Passover, has always remained the constant belief of Christian tradition.