નવ નેજા પાણી ચડે, પત્થર ન ભીંજે કાર.

nava nējā pāṇī caḍē, patthara na bhīṁjē kāra.

Literally: Nine times water rises, the stone does not get wet.
What it means: Some people are so stubborn or insensitive that no amount of effort can change them.

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.