Tenebrae (Maus John)

sing to the mystery of his blood sing to the mystery of his blood his blood his blood his blood sing to the mystery of his blood to die and lies on the day of days believe in all, believe in none till kingdom come, may his kingdom come mercy's r[...?] will be undone sing to the mystery of his blood sing to the mystery of his blood his blood his blood his blood sing to the mystery of his blood (from [1])