Ich lasse dich nicht, du segnest mich denn, BWV 157, is a church cantata by Johann Sebastian Bach. He composed it in Leipzig in 1726/27 to a libretto by Picander. The first known performance was on 6 February 1727 during a memorial service for Johann Christoph von Ponickau in Pomßen near Leipzig. The work was later assigned to the feast of the Purification celebrated on 2 February.