હરખઘેલા, હરખપદુડા થવું નહીં.

harakhaghēlā, harakhapaduḍā thavuṁ nahīṁ.

Literally: Do not become overjoyed or overly excited.
What it means: Warning against making foolish missteps due to unrestrained excitement.

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.