(original: , English: "I have enough" or "I am content"), , is a church cantata by Johann Sebastian Bach. He composed the solo cantata for bass in Leipzig in 1727 for the Feast (Purification of Mary) and first performed it on 2 February 1727. In a version for soprano, , 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. History and words Bach composed the cantata in his fourth year in Leipzig for the feast Purification of Mary. The prescribed readings for the feast day were taken from the book of Malachi, "the Lord will come to his temple" (), and from the Gospel of Luke, the purification of Mary and the presentation of Jesus at the Temple, including Simeon's canticle Nunc dimittis (), on which the libretto is based. In previous years Bach had composed two cantatas concentrating on Simeon's canticle, , in 1724 and the chorale cantata on Martin Luther's paraphrase of the canticle, , in 1725. More than in these earlier works, the text of Ich habe genug stresses the desire to escape earthly misery and be united with Jesus. Until recently the poet's identity was not known, but recent research suggests that he was Christoph Birkmann, a student at the University of Leipzig in the 1720s. Bach first performed the cantata on 2 February 1727. The extant autograph score and the parts show that he performed it at least three more times, in a version for soprano, BWV 82a, the first possibly in 1731 or even as early as 1730, another version for soprano in 1735; and again for bass, with minor changes to the original version, after 1745. Bach obviously had a high regard for this work. The first recitative and most of the aria "" were copied to the Notebook for Anna Magdalena Bach in a version with continuo accompaniment, presumably entered by Anna Magdalena Bach for her own use. Other cantatas that Bach performed for the same occasion are, according to Alfred Dürr, , , and , with similar topics. In the first version of the cantata, the choice of the bass