"Warum betrübst du dich, mein Herz" (Why are you afflicted, my heart)[1] is a Lutheran hymn.
According to some sources, both hymn writer and composer are anonymous.
1689a,[2] appeared on broadsides from the mid-16th century in Nürnberg, one of them dated 1561.
[citation needed] For a while the tune had been attributed to Hans Sachs.
[3][4] Johann Sebastian composed a chorale cantata on the hymn, Warum betrübst du dich, mein Herz, BWV 138.