The New Testament
Christian rock band from the 1976 Amoco-sponsored, animated educational film, The Kingdom of Mocha.
They're from the fictional island nation of Mocha, whose people are a hodge-podge of tired ethnic stereotypes. The band is fronted by the island's (presumably Catholic) priest, Father Nicodemus, and play "all state ceremonies as well as weddings, dances, and bar mitzvahs."
Amoco put out a sequel in 1986, Return to Mocha.