Werk BWV 150

Nach dir, Herr, verlanget mich (For Thee, O Lord, I long),[2] BWV 150,[b] is an early church cantata by Johann Sebastian Bach composed for an unknown occasion. It is unique among Bach's cantatas in its sparse orchestration and in the independence and prominence of the chorus, which is featured in four out of seven movements. The text alternates verses from Psalm 25 and poetry by an unknown librettist. Bach scored the work for four vocal parts and a small Baroque instrumental ensemble of two violins, bassoon and basso continuo.