 An alto and tenor duet, "" (How happy are they, who bear God in their mouths) is accompanied by continuo and obbligato violin with oboe da caccia.The movement is "submissive" in character with a texture that becomes more complex as the duet progresses, at one point including five simultaneous melodic lines.Bach uses a juxtaposition of "flowing, largely semi-quaver" instrumental parts with the vocal "crotchet/quaver rhythms" to depict the shield of the faithful; the two parts then coalesce to tell of the smiting of enemies.