જેની દાઢી લાંબી તે મૂર્ખ હોય.

jēnī dāḍhī lāṁbī tē mūrkha hōya.

Literally: He whose beard is long is a fool.
What it means: A long beard does not make a man wise, and is often a sign of a fool.

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.