From www.mutopiaproject.org

"Bist du bei mir, geh ich mit Freuden" is an aria from Gottfried Heinrich Stölzel's opera Diomedes, which was first staged on 16 November 1718. The aria is best known as "Bist du bei mir", BWV 508, a version for voice and continuo found as No. 25 in the 1725 Notebook for Anna Magdalena Bach.
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