O ewiges Feuer, o Ursprung der Liebe (O eternal fire, o source of love), BWV 34, is a church cantata by Johann Sebastian Bach. He composed it in Leipzig in for Pentecost Sunday, based on an earlier wedding cantata, BWV 34a, beginning with the same line. Bach led the first performance on 1 June 1727.

Librettist Anonymous
Date of composition 1726 (1726-1727) in Leipzig, Germany
First published 1857 in Leipzig, Germany
Type Cantata
Tonality D Major
Catalogue BWV 34
Approx. duration 21 minutes
Spoken language German
Instruments Voice (Alto)
Voice (Tenor)
Voice (Bass)
Chorus/Choir
Flute
Oboe
Trumpet
Timpani
Strings
Continuo
Autotranslations beta Jean-Sébastien Bach: O ewiges Feuer, o Ursprung der Liebe en ré majeur, BWV 34 ""O eternal fire, o source of love""
Johann Sebastian Bach: O ewiges Feuer, o Ursprung der Liebe in re maggiore, BWV 34 ""O eternal fire, o source of love""
Johann Sebastian Bach: O ewiges Feuer, o Ursprung der Liebe D-dur, BWV 34 ""O eternal fire, o source of love""