TANTUM ERGO (eng.)

Down in adoration falling,
Lo! the sacred Host we hail,
Lo! o'er 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 Ghost proceeding
Forth from Each eternally,
Be salvation, honor, blessing,
Might and endless majesty.
Amen.

V. Thou hast given them bread from heaven.
R. Having within it all Sweetness.
V. Let us pray: O God, who in this wonderful Sacrament left us a memorial of Thy Passion: grant, we implore Thee, that we may so venerate the sacred mysteries of Thy Body and Blood, as always to be conscious of the fruit of Thy Redemption. Thou who livest and reignest forever and ever.
R. Amen.

(Tantum ergo are the opening words of the last two verses of Pange Lingua, a Mediaeval Latin hymn written by St Thomas Aquinas.)