Ich habe genug, BWV 82, is a church cantata by Johann Sebastian Bach. He composed the solo cantata for bass in Leipzig in 1727 for the Feast Mariae Reinigung and first performed it on 2 February 1727. In a version for soprano, BWV 82a, possibly first performed in 1731, the part of the obbligato oboe is replaced by a flute. Part of the music appears in the Notebook for Anna Magdalena Bach. The cantata is one of the most recorded and performed of Bach's sacred cantatas. The opening aria and so-called "slumber aria" are regarded as some of the most inspired creations of Bach.

The title Notebook for Anna Magdalena Bach refers to either of two manuscript notebooks that the German Baroque composer Johann Sebastian Bach presented to his second wife, Anna Magdalena. Keyboard music makes up most of both notebooks, and a few pieces for voice are included.