Trinitatis XX is the 20th Sunday after Trinitatis. Three cantatas for this day, an earlier one from the Weimar period and two from Leipzig.
Ach! ich sehe, itzt, da ich zur Hochzeit gehe, BWV 162, was composed by Bach in Weimar, where he created a new cantata every month. It was first performed in the Schlosskirche in Weimar in 1715 or 1716, the date is not certain. We do know that he performed the cantata again in Leipzig, and even added a corno da tirarsi (a pullhorn).
The chorale cantata Schmücke dich, o liebe Seele, BWV 180, is based upon Johann Franck''s (1618-1677) hymn with the same name, with a melody by Johann Crüger. It matches the Sunday''s prescribed reading, the Parable of the Great Banquet from the Gospel of Matthew.
Ich geh und suche mit Verlangen, BWV 49, from the third cantata cycle, features a dialog between bass and soprano, also the only soloists in this cantata.