The Illustrated Bible Dictionary
Mahalath Maschil
Easton’s Bible Dictionary (1897)
in the title of Psalm 53, denoting that this was a didactic psalm, to be sung to the accompaniment of the lute or guitar. Others regard this word “mahalath” as the name simply of an old air to which the psalm was to be sung. Others, again, take the word as meaning “sickness,” and regard it as alluding to the contents of the psalm.