Cantata no. 34a: O ewiges Feuer, O Ursprung der Liebe, BWV.34a

O ewiges Feuer, o Ursprung der Liebe (O eternal fire, o source of love), BWV 34.2 (formerly BWV 34a) is an incomplete wedding cantata composed by Johann Sebastian Bach, of which only the complete libretto and some parts (movements 2, 3 and 6) have survived.