લોહાડાનું ને ઘોડાનું મૂળ નહીં.

lōhāḍānuṁ nē ghōḍānuṁ mūḷa nahīṁ.

Literally: Iron and a horse have no fixed origin.
What it means: Said because iron goods and horses pass through so many hands that their true provenance cannot be known.

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.