The Charioteers

The Charioteers were an American gospel and pop vocal group from 1930 to 1957. They originally called themselves the Harmony Four. Later they changed the name to the Charioteers, from the song "Swing Low, Sweet Chariot", a favorite in the group's repertoire, which they eventually recorded in 1939. They were the studio chorus on Bing Crosby's radio program, Kraft Music Hall, from 1942 to 1946.
Wikipedia