I think this is Le Sélam which, although Reyer (1823-1909) called it an Oriental Symphony, is really more of a cantata as it is a large scale (30-40 minute long) choral work with, IIRC, a narrator too. It is clearly inspired by Felicien David's Le Désert. It's a melodic and effective work, safely exotic for Victorian audiences, and very French.
Reyer himself was primarily an opera composer. I have recently acquired recordings of his most famous work, Sigurd, a spectacular grand opera in the Meyerbeer tradition and also Salammbo, which is pretty similar. He has a gift for melody and colourful orchestration which is very appealing and I'm surprised that these three works aren't better known. Well worth exploring.