According to Hymns Ancient and Modern (1867) & Cyber Hymnal, this text is based on the Roman Breviary hymn Æterna Christi Munera (Christo Profusum Sanguinem) from the Common of Apostles and of Martyrs. Hymns Ancient and Modern indicates that this hymn “freely imitates from” the Latin and lists it under the heading “Martyrs, etc.”
This is the text of the hymn as it appears in Hymns Ancient and Modern (1867):
(1)Ye servants of our glorious King,
To Him your thankful praises bring;
And tell the deeds that Grace has done,
The triumphs by His Martyrs won.
Since they were faithful to the last,
Their holy struggles now are past;
The bitterness of death is o’er,
And theirs is Bliss for evermore.
The flame did scorch, the knife lay bare,
And cruel beasts their members tear;
No powers of earth, no powers of hell
The souls that loved their Lord could quell.
For ever broken is the chain
That sought to bind them, but in vain:
O let us strive like them to win
Our freedom from the bonds of sin.
O Saviour! may our portion be
With those who gave themselves to Thee,
Through all eternity to sing
All praise to Thee, the Martyrs’ King.
All praise to God the Father be,
All praise, Eternal Son, to Thee,
Whom with the Spirit we adore
For ever and for evermore. Amen.
Words: Robert Campbell, 19th C.*
Tune: “Constance (Gauntlett)“ Henry J. Gauntlett, 1861.
*Hymns Ancient and Modern indicates that authorship is anonymous.
(1) Hymns Ancient and Modern indicates the first line was originally “Ye servants of a martyred Lord.”