તુલસી નીજ કીર્તિ ચહે, પરકી કીર્તિ ધોય;

tulasī nīja kīrti cahē, parakī kīrti dhōya;

Literally: Tulsidas says, he who desires his own fame by washing away the fame of others.
What it means: Those who try to build their own reputation by slandering others only end up bringing disgrace upon themselves.

Also said as

ગુજરાતી કહેવતસંગ્રહ (Gujarati Kahevat Sangrah) (1923) ગુજરાતી કહેવતસંગ્રહ (Gujarati Kahevat Sangrah) (1921) · 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.