This is text translated and paraphrased last century by Christopher Idle from a fourth century Latin text attributed to St Nicetas.
It will fit liturgies such as Christ the King and Holy Trinity.
The text is at Hymnary thanks to Hope Publishing (have I said they are wonderful lately?)
OCP set the text to NETTLETON and their sheet music is available here, The tune is, however, public domain. These words has also been set to RUSTINGTON and REX GLORIAE.
I’ve mentioned this tune in passing before but have never made a backing , so here is some fake organ from BIAB.
This is better:
An enthusiastic ensemble and assembly: