This Mit Fried und Freud is an SATB 12-bar arrangement taken from Johannes Brahms's Motet op. 74, no. 1 Warum ist das Licht gegeben of which it is the final chorale,
I got to sing the bass part when a member of Collegium Musicum Bremen in the late 1990's.. The words are expressively of dying peacefully ("sanft und stille") whereby sleep is replaced by death.
The arrangement can be found in Chor Aktuell 1 published by Gustav Bosse Verlag.