He can sell ice on Rura Penthe.
More Klingon Proverbs:
Don't catch any bugs.Klingon
Only fools don't attack.
Klingon
If you cannot be shamed, you cannot be honored.
Klingon
Klingons do not surrender.
Klingon
To find ale, go into a bar.
Klingon
Motives are insignificant.
Klingon