Tantum ergo Sacramentum.

Tantum Ergo is the last two stanzas from the Eucharistic Hymn (Pange Lingua) composed by St. Thomas Aquinas (1225-1274) 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.

Tantum ergo Sacramentum

Veneremur cernui:

Et antiquum documentum

Novo cedat ritui:

Praestet fides supplementum

Genitori, Genitoque

Laus et iubilatio,

Salus, honor, virtus quoque

Sit et benedictio:

Procedenti ab utroque

Compar sit laudatio.

Sensuum defectui.

Amen.

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.

Amen.