O Lamm Gottes, unschuldig BWV 1085 (Chorale)

Whose song is O Lamm Gottes, unschuldig BWV 1085 (Chorale)?

Artist Album
Gerhard Weinberger (Trost-Orgel Schlosskirche Altenburg)
Bach Orgelwerke 07
J.S. Bach - Organ Works Vol. 07