Beatus Vir

"Those who were freed by Moses from slavery in Egypt sang a song of triumph to the Lord after they had crossed the Red Sea and Pharaoh’s army had been overwhelmed; in the same way, now that our sins have been washed away in baptism, we too should express fitting gratitude for the gifts of heaven. The Egyptians who oppressed the people of God, and who can also stand for darkness or trials, are an apt symbol of the sins that once oppressed us but have now been destroyed in baptism." Saint Bede the Venerable, priest.

Ad Coenam Agni providiet
stolis albis candidi
post transitum maris rubis
Christo canamus principi.
Cuius corpus sanctissimum
in ara crucis torridum
cruore eius roseo
gustando vivimus Deo.
(medieval hymn Listen here )

Awaiting the banquet of the Lamb,
and in brilliant white robes,
after the crossing of the Red Sea,
let us sing to Christ our Prince,

Whose most holy body
is immolated on the altar of the Cross;
tasting of his rose-colored blood,
we live in God.