This hymn is used for Vespers on the now defunct feast of St. Peter’s Chains on August 1.
The Lord commands; and, lo, his iron chains,
Falling from Peter, the command obey:
Peter, blest shepherd! who, to verdant plains,
And life’s immortal springs, from day to day,
Leads on his gentle charge, driving all wolves away.
Praise to the Father, through all ages be;
The same to Thee, O coeternal Son,
And Holy Ghost, One glorious Trinity;
To whom all majesty and might belong;
So sing we now, and such be our eternal song.
Words: ascr. St. Paulinus of Aquileia, 8th C.; tr. Fr. Edward Caswall, C.O., 1849.
Tune: Unknown – does not seem that any tunes exist in this meter.
The original Latin text of this hymn may be found here.