Plenary Indulgence for the Feast of Corpus Christi

Courtesy of uCatholic: Tantum Ergo is the last two stanzas from the Eucharistic Hymn (Pange Lingua) composed by St. Thomas Aquinas and is used at Benediction of the Blessed Sacrament. The response and the prayer at the end is a later addition used at Benediction. A partial indulgence is granted to the faithful who recite it and a plenary indulgence is granted to those who recite it on Holy Thursday or Corpus Christi. 

Latin

Tantum ergo Sacramentum

Veneremur cernui:

Et antiquum documentum

Novo cedat ritui:

Praestet fides supplementum

Sensuum defectui.

Genitori, Genitoque

Laus et iubilatio,

Salus, honor, virtus quoque

Sit et benedictio:

Procedenti ab utroque

Compar sit laudatio.

V. Panem de cælis præstitisti eis (on Corpus Christi, 'Alleluia' is added).
R. Omne delectamentum in se habentem (on Corpus Christi, 'Alleluia' is added).

Oremus: Deus, qui nobis sub sacramento mirabili, passionis tuæ memoriam reliquisti: tribue, quæsumus, ita nos corporis et sanguinis tui sacra mysteria venerari, ut redemptionis tuæ fructum in nobis iugiter sentiamus. Qui vivis et regnas in sæcula sæculorum. Amen.

English

Down in adoration falling,

Lo! the sacred Host we hail,

Lo! oe'r ancient forms departing

Newer rites of grace prevail;

Faith for all defects supplying,

Where the feeble senses fail.

To the everlasting Father,

And the Son Who reigns on high

With the Holy Spirit proceeding

Forth from each eternally,

Be salvation, honor blessing,

Might and endless majesty.

V. You have given them bread from heaven, (Alleluia,)

R. Having all sweetness within it. (Alleluia.)

Let us pray. O God, who in this wonderful Sacrament left us a memorial of your Passion: grant, we implore you, that we may so venerate the sacred mysteries of your Body and Blood, as always to be conscious of the fruit of your Redemption. You who live and reign forever and ever. Amen. (Roman Breviary)