 Bach performed his motet "Der Geist hilft unser Schwachheit auf, BWV 226", first on 21 October 1729 in a memorial service for Johann Heinrich Ernesti (1652-1729), rector of the Thomasschule.Probably in 1733, Bach performed his cantatas "Laßt uns sorgen, laßt uns wachen, BWV 213" (Hercules at the Crossroads), for the birthday of the heir to the throne of the elector, and "Tönet, ihr Pauken!Erschallet, Trompeten!