મેહનત બરબાદ ને ગુનાહ લાજમ.

mēhanata barabāda nē gunāha lājama.

Literally: Hard work is ruined and the sin is mandatory.
What it means: It describes a situation where one's efforts are wasted and they are left with the burden of a fault.

કહેવત સમુદાય (Kahevat Samuday) · read from the scan by machine — the Gujarati itself is unchecked · English is machine-made and nobody has checked it yet

Heard it differently, or know we've got the sense wrong? Tell us — that is exactly the kind of correction this needs.