[IDEM libro quadragensimo secundo ad Sabinum. ] §50.17.31.prUerum est neque pacta neque stipulationes factum posse tollere: quod enim impossibile est, neque pacto neque stipulatione potest comprehendi, ut utilem actionem aut factum efficere possit.
[THE SAME, in his forty-second book on Sabinus.] It is true that neither agreements nor stipulations can undo a fact; for what is impossible cannot be comprised in an agreement or a stipulation, so as to be able to produce a valid action or fact.