વીતી હોય તે જાણે. બે દરદીની ઓલા જાણે.

vītī hōya tē jāṇē. bē daradīnī ōlā jāṇē.

Literally: One who has experienced it knows; the two patients know the pain.
What it means: Only those who have suffered the same hardship can truly understand each other.

Also said as

ગુજરાતી કહેવતસંગ્રહ (Gujarati Kahevat Sangrah) (1923) · 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.