હજાર કીધેલી નેકી એકજ બુરાઇ કીધાથી દુખી જાય.

hajāra kīdhēlī nēkī ēkaja burāi kīdhāthī dukhī jāya.

Literally: A thousand good deeds are ruined by doing one bad deed.
What it means: One mistake can overshadow a lifetime of good work.

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.