Bach’s Cantata 186a Ärgre dich, o Seele, nicht (Do not be confounded, o soul), originally composed in 1716 for the third Sunday in Advent in Weimar, is another of those that was since lost. Luckily, Bach had reworked and expanded the cantata during his Leipzig years. The later 1723 version still survives.
Bach’s expanded version (BWV 186) includes recitatives and the addition of taille (tenor oboe). Have a listen to a recording by Ton Koopman and The Amsterdam Baroque Choir.