[TRYPHONINUS libro septimo disputationum. ] §12.6.64.prSi quod dominus seruo debuit, manumisso soluit, quamuis existimans ei aliqua teneri actione, tamen repetere non poterit, quia naturale adgnouit debitum: ut enim libertas naturali iure continetur et dominatio ex gentium iure introducta est, ita debiti uel non debiti ratio in condictione naturaliter intellegenda est.
[TRYPHONINUS, in his seventh book of Disputations.] If a master pays what he owed to his slave after the slave has been manumitted, even though he believes that he is bound to him by some action, he will nevertheless not be able to recover it, because he has recognized a natural debt. For just as freedom is contained in natural law and mastership was introduced by the law of nations, so the concept of what is due or not due must be understood naturally in a condictio.