You don’t cast a net into a river that has no fish.
More Sicilian Proverbs:
The unmarried don't know about labor pains.Sicilian
The pardon arrives after the man was hung.
Sicilian
A hot sun with a lot of wind, I go home and I am happy.
Sicilian
Justice that's pending is injustice attending.
Sicilian
If the North Wind takes to blowing, it will rain for a week.
Sicilian
The olive grove of your grandfather, the cherry trees of your father, and your grape vines.
Sicilian