Der Friede sei mit dir (Peace be with you), BWV 158, is the shortest of the cantatas by Johann Sebastian Bach and features a bass soloist. It survives as a cantata for the third day of Easter but might be a fragment of a work originally written for Purification. Given this background, and the fact that it was copied by Christian Friedrich Penzel, one of Bach's last students, there is a confusing variety of proposed composition dates. It may date back to Bach's Weimar period, although a date as late as 1735 has been suggested.