The following is the results of your search for mahalath leannoth, maschil.
Mahalath Leannoth, Maschil: This word leannoth seems to point to some kind of instrument unknown
(Psalms 88:1) title). The whole phrase has by others been rendered, "On
the sickness of affliction: a lesson;" or, "Concerning afflictive
sickness: a didactic psalm."