Êxodo 12
Bede
Êxodo 12:3
It was commanded that the paschal lamb, by whose immolation the people of Israel were freed from slavery in Egypt, should be selected five days before the [feast of] Passover, that is, on the tenth [day of the lunar] month, and immolated on the fourteenth [day of the lunar] month at sundown. This signified the one who was going to redeem us by his blood, since five days before the [feast of] Passover (that is, today), accompanied by the great joy and praise of people going ahead and following, he came into God's temple, and he was there teaching daily. At last, after five days, having observed up to that point the sacraments of the old Passover, he brought them to perfect fulfillment, and he handed over the new sacraments to his disciples to be observed henceforth.[Then], having gone out to the Mt. of Olives, he was seized by the Jews and crucified [the next] morning. He redeemed us from the sway of the devil on that very day when the ancient people of the Hebrews cast aside the yoke of slavery under the Egyptians by the immolation of the lamb. — Homilies on the Gospels 2.3
Êxodo 12:11
Passover means "passing over." It derives its ancient name from the Lord's passing over on this [day] through Egypt, striking the firstborn of the Egyptians and freeing the children of Israel, and from the children of Israel's passing over on that night from their slavery in Egypt in order that they might come to the land which had once been promised to their heirs as a land of peace. Mystically it signifies that on this [day] our Lord would pass over from this world to his Father. Following his example, the faithful, having cast off temporal desires and having cast off their slavery to vices by their continual practice of the virtues, should pass over to their promised heavenly fatherland. — Homilies on the Gospels 2.5