Babylon 5, Season 5: The Wheel of Fire

Vir Cotto:
One time, we were walking through the Alien sector, and we heard this beautiful singing coming from the Pak'Ma'Ra's quarters.

John Sheridan:
They sing?

Stephen Franklin:
There's nothing in the literature about that.

Vir:
Apparently they only ever do it once a year, during their religious period. And we were listening to this singing and I saw a tear run down Londo's face, and I said, "We should go, this is upsetting you." But he said no, and we stayed. After the singing was over he turned to me and said, "There are 49 Gods in our Pantheon, Vir. To tell you the truth I've never really believed in any of them. But if just one of them exists…then God sings with that voice."