જોઈ વાહરીએ જાત, જાતે જોયા લાગે નહીં;

jōī vāharīē jāta, jātē jōyā lāgē nahīṁ;

Literally: Consider lineage before dealing; inherently noble character does not fade.
What it means: One should inspect a person's lineage before making alliances, as true character remains steadfast.

Also said as

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.