[IDEM libro primo epistularum. ] §17.1.52.prFideiussorem, si sine adiectione bonitatis tritici pro altero triticum spopondit, quodlibet triticum dando reum liberare posse existimo: a reo autem non aliud triticum repetere poterit, quam quo pessimo tritico liberare se a stipulatore licuit.
[THE SAME from the first book of Epistles] I think that if a surety has promised wheat on behalf of another without any specification of the quality of the wheat, he can release the principal debtor by giving any wheat whatsoever; however, he will not be able to recover from the debtor any other wheat than the worst wheat by which he himself could have been released from the stipulator.
itaque si paratus fuerit reus, quod dando ipse creditori liberari potuit, fideiussori dare et fideiussor id quod dederit, id est melius triticum condicet, exceptione eum doli mali summoueri existimo.
Therefore, if the debtor is ready to give to the surety what he himself could have given to the creditor to be released, and the surety claims what he gave, that is, the better wheat, I think that he (the surety) is barred by the plea of fraud.