Andante and Allegro D-major, BWV 1028, arranged for Transverse Flute, Violin and Viola or 2 Violins und Viola
Original from the Gamba Sonata No. 2 in D major, movements 3 and 4 https://music-learning.net/work-info/73/Bach%20J.s./andante-and-allegro-d-major-bwv-1028-arranged-for-transverse-flute-violin-and-viola-or-2-violins-und-viola