Let my right hand forget her cunning, &c.— There is nothing for her cunning in the original. The plain meaning is, "May my right hand forget to play upon the harp; may my tongue cleave to the roof of my mouth, disenabling me from singing, if I prefer not, or according to the original, if I advance not Jerusalem in the beginning of my joy;" that is, "If again I sing any such festival songs, till that joyful day shall come, when I shall see Jerusalem and her holy solemnities restored."
Related Commentaries of Psalms 137:5
Psalms 137:5-6
5 If I forget thee, O Jerusalem, let my right hand forget her cunning.
6 If I do not remember thee, let my tongue cleave to the roof of my mouth; if I prefer not Jerusalem above my chiefc joy.