Maritime Provençal
Es un pesca borni.
Meaning
It is a trade that needs but one eye.
Note : Applied to all those whose trade, easy to ply, brings in a great deal of money.
Theme
Source : La Tour-Keyrié, Recueil de proverbes provençaux (1882), Gallica — public domain. Maritime Mistralian normalisation by Lingua Nostra.