Im eshkachech [bad word] 
Tishkach yemini
Tidbak leshoni lechiki
Im lo ezkerechi
Im lo a’aleh et [bad word] 
Al rosh simchati

Translation (Psalms 137)

If I forget thee, O [bad word] 
let my right hand forget her cunning.
Let my tongue cleave to the roof of my mouth,
if I remember thee not;
if I set not [bad word] above my chiefest joy.