Joseph Benson's Commentary of the Old and New Testaments - Psalms 137:5-6
Psalms 137:5-6. If I forget thee, O Jerusalem If I do not retain a deep and sorrowful sense of thy desolations, though never so far removed from thee; or if I indulge myself in mirth and jollity, as if I had forgotten thee; let my right hand The hand chiefly used in playing on musical instruments, and in all other actions; forget her cunning That is, lose its skill of playing. In the Hebrew it is only, Let my right hand forget, without expressing what, to intimate the extent and... read more
Albert Barnes' Notes on the Whole Bible - Psalms 137:5
If I forget thee, O Jerusalem - The meaning here is, that to sing in such circumstances would seem to imply that they had forgotten Jerusalem; that they were unmindful of its sorrows, and cared not that it was desolate. The remembrance of its calamities pressed hard upon them, and they could not do anything which would seem to imply that they had become unmindful of the sufferings that had come upon their nation. One will not make merry when a wife or child lies dying - or on the day of the... read more