Is this the comedy where the townsfolk had to fake the lyrics to a hymn?

I recall just a snippet of a tv comedy western, where the town had a church, but the townsfolk apparently never saw the inside of it. For some reason, they all had to turn out at church, and nobody knew the order of service, so they were all faking it. Somebody remembered they were supposed to sing hymns, so they start singing "Rock of Ages", except they don't know any of the words except for "Rock of Ages, cleft for me", so every line is that line sung to the tune. I believe this was the show, we only had a little b/w portable tv then, didn't have time for much tv. If I have the right show, please let me know. It was a gem.