This is a loose translation of an alleged Venetian proverb from 1610:

> To achieve justice you need
> the bag of a banker,
> the patience of a hermit,
> to be right,
> to know how to explain you are right,
> to find someone who listens
> and wants to acknowledge you are right,
> and a debtor who can pay.

The source, a judge with a very known and brilliant blog in Spain, has it in Spanish:

> Para hacer justicia hace falta
> Bolsa de banquero,
> Paciencia de ermitaño,
> Tener razón
> Saberla exponer
> Encontrar quien la escuche
> Y se la quiera dar
> Y deudor que pueda pagar.