Martha & James Carson. Author J.B. Coats was a Mississippi school teacher conducting his own quartet in the 1920s. The song first came out in '42 in a songbook for radio entertainers.
Bailey Brothers [early bluegrass version on The Early Days Of Bluegrass Vol. 6 (Rounder)]
James And Martha [the same as the original]
Linda Ronstadt [with Emmylou Harris, second voice]
Seldom Scene [bluegrass live version with Emmylou Harris and Linda Ronstadt]
Judds [knew it from Hazel & Alice]
Erik & Sanne [as Een Stukje Hemel]
Trisha Yearwood [on Christmas album The Sweetest Gift]