ભાડાની વેલ, ને ઉનાળી મેલ.

bhāḍānī vēla, nē unāḷī mēla.

Literally: A rented bullock cart, and summer rain.
What it means: Temporary expedients disappear quickly and cannot be counted on long term.

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.