Kantate, BWV 50 „Nun ist das Heil und die Kraft“: Coro „Nun ist das Heil und die Kraft“

Per the booklet:

There’s no such thing as a cantata in one movement, not even
by the ingenious Johann Sebastian Bach. So this composition
is rather baffling. The American Bach specialist William H.
Scheide believes (in: Bach-Jahrbuch 1982, p. 81 - 96) that
this is a kind of “epistle music” that Bach composed for and
performed on St. Michael’s day, 29 September 1723 as an
interlude for a (lost) Köthen cantata. It’s quite possible that it
was intended for the Archangel’s feast day, because the
libretto of this cantata was read from the Revelation on this
day. As Bach didn’t have sufficient singers to cast a double
choir for church services in Leipzig – unlike the grand
occasions, on which he composed his motets for double choir
– according to Scheide, only a double-choir arrangement by a
different composer of an original five-part setting is recorded.