This is a Taizé style song by David Haas from “Table Songs” in that it has an ostinato refrain that continues under the verses sung by cantors. It differs from Taizé in that it much more theatrical in style and the verses are definitely cantor only – high held notes abound.
The text is here and you can hear it in all its splendour at Haas’s Myspace page.
My backing drops the refrain out for clarity during the verses but do keep singing if you are doing that part. I’ve given different voices to the soprano and tenor parts and put them in opposite speakers so you can hear the duet in the third verse. If you have two excellent cantors give it a go.