/Music of the 17th and 18th centuries/
Ach Gott, vom Himmel sieh darein (Ah God, look down from heaven) BWV 2 is written for the 2nd Sunday after Trinity in 1724.
'This chorale cantata is based on Martin Luther's adaptation of Psalm 12, which laments that mankind turns away from God and is led astray into godless living by heretical teaching.' (Dürr 2005: 403)
Text and translation: http://emmanuelmusic.org/notes_translations/translations_cantata/t_bwv002.htm
Playlist of all the music I have shared: https://goo.gl/i6DApN