"O sacrum convivium" is a Latin prose text honoring the Blessed Sacrament.
It is included as an antiphon to the Magnificat in the vespers of the liturgical office on the feast of Corpus Christi.
[1][2] Its sentiments express the profound affinity of the Eucharistic celebration, described as a banquet, to the Paschal mystery : "O sacred banquet at which Christ is consumed, the memory of his Passion is recalled, our souls are filled with grace, and the pledge of future glory is given to us.
"[3] The 2004 Enchiridion Indulgentiarum grants a partial indulgence for saying this prayer.
[4] O sacrum convivium exists in Gregorian and Ambrosian chant forms.