જાત જાતના વેરી, તે જાત જાતને ખાય;

jāta jātanā vērī, tē jāta jātanē khāya;

Literally: Enemies of the same kind, they eat their own kind.
What it means: Rivalry is most intense between those in the same field.
The English proverb Shah set beside it: Two of the same profession seldom agree.

Also said as

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