Down Came An Angel
It's not exactly like that, but pretty close. Of course, this being the piano version you won't hear those lyrics, but I just learned them from Sweet the Sound because we sing it at our Christmas gigs.
Anyway, the double bonus about buying this lovely recording is that Jacqueline is married to Unitarian Universalist minister, so there's a family connection there for UUs.
It's available on Amazon.com at this link: