“May my right hand cease to function”
If I forget you, O Jerusalem, may my right hand cease to function. May my tongue cling to the roof of my mouth if I do not remember you. (Psalm 137:5 BSB)
What it sounds like today
A dramatic wish for his hand and tongue to fail.
The cultural key
This is not a stray flourish of despair but a formal self-imprecation, the kind of binding oath where a person invokes a curse on himself if he breaks his word. The exiles, mocked by their captors to 'sing us a song of Zion,' swear undying loyalty to Jerusalem by staking their two most precious powers on it. The 'right hand,' the strong hand and, for these temple singers, the hand that plays the harp, stands for a person's skill and strength; may it wither or 'cease to function.' The tongue, the instrument of song and speech, is the other stake; may it 'cling to the roof of my mouth,' struck mute. In other words: if I ever forget you, Jerusalem, let me lose the very abilities that make me who I am. Job swears in the same manner, calling for his arm to fall from its socket if he has done wrong (Job 31:22). It is an oath of total devotion, sealed by the threat of self-loss.
Recovered meaning
The verse is a self-curse oath: may my skilled right hand and my singing tongue both fail if I ever forget Jerusalem. The exiles bind their loyalty to the city by staking their most prized faculties on it.