[IDEM libro quadragensimo sexto ad Sabinum. ] §12.6.24.prSi is, qui perpetua exceptione tueri se poterat, cum sciret sibi exceptionem profuturam, promiserit aliquid ut liberaretur, condicere non potest.
[THE SAME, On Sabinus, Book 46.] If he who could defend himself by a perpetual exception, although he knew that the exception would be of benefit to him, promised something in order to be released, he cannot bring an action for recovery.