Ave Verum Corpus (Hail, true body), (K. 618), is a motet in D major composed by Wolfgang Amadeus Mozart in 1791. It is the setting of the Latin hymn Ave Verum Corpus. Mozart wrote it for Anton Stoll, a friend who was the church musician of St. Stephan in Baden bei Wien. The motet was composed for the feast of Corpus Christi; the autograph is dated 17 June 1791. It is scored for SATB choir, string instruments, and organ.
Here is a an arrangement for cello quartet.
The PDF file contains the score and all instrumental part.