નેવનાં પાણી મોભે જાય નહીં.

nēvanāṁ pāṇī mōbhē jāya nahīṁ.

Literally: The water from the eaves does not go to the roof.
What it means: Things follow their natural order and cannot be forced to go against it.

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.