Ich lasse dich nicht, du segnest mich denn (I will not let you go unless you bless me), BWV 1164 (renumbered from BWV Anh. 159), is a motet for SATB double choir which was attributed to Johann Sebastian Bach when it was first published in 1802. Around 1823 the motet was published as a composition by Johann Christoph Bach, Johann Sebastian's father's cousin, after which its attribution became a matter of discussion among scholars. The motet consists of two movements: the oldest extant manuscript of its first movement was partly written by Johann Sebastian, in 1712, or early 1713 at the latest. Its second movement is without doubt a chorale harmonisation by Johann Sebastian composed before c. 1735, when a version of this setting was copied in the Dietel manuscript, but it is uncertain when,