Nocturne
From BiblePortal Wikipedia
Webster's Dictionary [1]
(n.) A night piece, or serenade. The name is now used for a certain graceful and expressive form of instrumental composition, as the nocturne for orchestra in Mendelsohn's "Midsummer-Night's Dream" music.
The Nuttall Encyclopedia [2]
Picture of a night scene; also a musical piece appropriate to the night.