 Dürr suggests 1735, because in that year Bach wrote "Wär Gott nicht mit uns diese Zeit", BWV 14, which had an opening chorus of a comparable structure and was also based on a hymn by Luther.The final version includes all stanzas of the hymn but is nonetheless not in the format of Bach's second cantata cycle begun in 1724; in that cycle, each chorale cantata relies exclusively on one Lutheran hymn.Bach's son Wilhelm Friedemann Bach, who inherited the scores, later adapted the first and fifth movement, adding parts for three trumpets and timpani.