John the Revelator

"John the Revelator" is a traditional Gospel/blues call and response song. In the chorus, John of Patmos, the traditional author of the Book of Revelation, is writing "the book of the seven seals." At the time of the song's composition (and in modern times), John of Patmos was generally considered the same person as John the Apostle and John the Evangelist.
The song was recorded on April 20, 1930 in Atlanta, Georgia by Blind Willie Johnson and is included in the Anthology of American Folk Music. In this version Johnson's first wife Willie B. Harris performs the response parts of the song.
Son House also recorded several a cappella versions in the 1960s.
Here, we can see also a Blues Brothers version, embedded on Blues Brothers 2000 movie, performed by Sam Moore, Joe Morton, Sharon Riley and the Faith Chorale, as well as The Blues Brothers Band.