[IULIANUS libro decimo digestorum. ] §12.2.39.prSi quis cum debitore suo pepigerit, ne ab eo pecunia peteretur, si iurasset se Capitolium non ascendisse uel aliud quodlibet fecisse uel non fecisse, isque iurauerit, et exceptio iurisiurandi dari debebit et solutum repeti poterit: est enim iusta conuentio, si quaelibet causa in condicione iurisiurandi deducta fuerit.
[JULIANUS, Book 10 of the Digests.] If anyone has agreed with his debtor that money should not be demanded from him, provided that he swore that he had not ascended the Capitol, or had done or not done any other thing whatsoever, and he has sworn to this, both the objection of an oath must be granted and what has been paid can be recovered; for it is a valid agreement if any matter whatsoever has been brought into the condition of an oath.