Pasch And Sacrament

Interea fit pascha : in occisione agni occiditur Christus, de quo in Evangelio dicitur : Ecce agnus Dei, ecce qui tollit peccata mundi. Vespere immolatur agnus, in vespera mundi passus est Domiinus. Prohibentur qui pascha faciunt ossa frangere; non franguntur in cruce ossa Domini, attestante evangelista, qui ait: Os ejus non comminuctis. Sanguine agni illiniuntur Israelitarum postes, ne vastator angelus adueat inferre perniciem. Signantur signo dominicae passionis in frontibus fideles populi ad tutelam salutis, ut hi soli ab interitu liberentur, qui cruore dominicae passionis corde et fronte signati sunt, qui etiam opere loquuntur: Signatum est super nos lumen vultis tui, Domine. Unde et appelatur ipsa solemnitas Phase, quod nos transitum possumus vocare, eo quod de perjoribus ad meliora pergentes, tenebrosam Aegyptum derelinquimus. Quod autem ait de agni illius est: Omnis alienigena non comedet ex eo, et in una domo comedetur, nec efferetis de carnibus ejus foras, hoc de Christi corporis sacramento, cujus agnus ille figuram obtinuit, proprie tenetur scriptum: cujus corpus et sanguis in una domo, id est, in una Ecclesia vesci praecipitur, nec efferri foras, in plebibus scilicet haereticorum, quae ab eadem Eccelsiae catholicae unitate foris vagantur. Sanctus Isidorus Hispalensis,Mysticorum Expositiones Sacramentorum Seu Quaestiones In Vetus Testamentum, In Exodum, Caput XV Source: Migne PL 83.294d-295b

Meanwhile the Passover is performed 1: in the killing of the lamb is the killing of Christ, concerning which it says in the Gospel: 'Behold the lamb of God, behold he who takes away the sins of the world.' 2 The lamb is sacrificed in the evening, in the evening of the world the Lord suffered. They who perform the Passover are prohibited from breaking a bone; the bones of the Lord were not broken on the cross, as the Evangelist bears witness, who says: 'His bones were not broken.' 3 With the blood of the lamb the door posts of the Israelites are daubed, lest the devastating angel venture to bring ruin. The faithful are signed with the sign of the Lord's passion on their brows for the security of salvation, as only those who are signed with the blood of the Lord's passion in their hearts and on the brow are delivered from ruin, who even it being done, say: 'Sealed on us is the light of your face, O Lord.' 4 Whence this solemnity is named 'Phase' which is what we call 'a passing over', by which passing from the worst to best, we abandon the darkness of the Egyptians. And when it is said, 'No foreigner shall eat of it, and in one house it shall be eaten, and you shall not take the flesh outside,' 5 this concerns the sacrament of the body of Christ, of which the lamb is a figure, and that especially it be held that which is written: 'the body and blood of it be in one house,' that is, it is commanded to be eaten in one Church, not outside, that is, not among the people of the heretics who wander outside the unity of the Catholic Church . Saint Isidore of Seville, Expositions of Sacred Mysteries or Questions on the Old Testament, On Exodus, Chap 15 1 Exod 12 2 Jn 1.29 3 Jn 19.32-33 4 Ps 4.7 5 Exod 12.43-46