અવસર ચુક્યા મેહુલા, પાણી વગરનાં વેવલાં.

avasara cukyā mēhulā, pāṇī vagaranāṁ vēvalāṁ.

Literally: Rain that missed the season is like useless people without water.
What it means: Help or action provided after the critical moment has passed is entirely useless.

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.