Although it is an antiphon for Corpus Christi, and not for Holy Thursday, it is hardly an inappropriate thing to hear today. The first setting is Gregorian; the second by Messiaen.
To everyone who will be celebrating it, I extend my best wishes for a blessed Triduum and Easter.
O sacrum convivium!
in quo Christus sumitur:
recolitur memoria passionis eius:
mens impletur gratia:
et futurae gloriae nobis pignus datur.
O sacred feast!
wherein Christ is received:
the memory of His Passion is renewed in us:
our souls are filled with grace:
and the pledge of everlasting glory is given to us.