Trinitarian Hymn from 10th Century

Father most holy, merciful and loving,
Jesu, Redeemer, ever to be worshipp’d,
Life-giving Spirit, Comforter most gracious,
God everlasting.

From the anonymous tenth-century Latin hymn O Pater, Sancte. English translation from Hymns Ancient and Modern: For Use in the Services of the Church with Accompanying Tunes (London: William Clowes and Sons, 1904), #189.