[IDEM libro decimo epistularum. ] §45.1.108.prA Titio ita stipulatus sum: 'si qua mihi nupserit, decem dotis eius nomine dare spondes?' quaerebatur, an consistat talis stipulatio.
[THE SAME, book ten of Letters.] I stipulated thus from Titius: 'If any woman marries me, do you promise to give ten in the name of her dowry?' It was asked whether such a stipulation is valid.
respondit: si stipulanti mihi dos ita promissa est: 'quamcumque uxorem duxero, dotis eius nomine decem dare spondes?', nihil in causa est, quare ea pecunia condicione expleta non debeatur: nam cum condicio etiam ex incertae personae facto parere obligationem possit, ueluti 'si quis in Capitolium ascenderit, decem dare spondes?' 'si quis a me decem petierit, tot dare spondes?', cur non idem et in dote promissa respondeatur, ratio reddi non potest.
He answered: If a dowry is promised to me when stipulating in this way: 'Whomever I take as wife, do you promise to give ten in the name of her dowry?', there is no reason why that money should not be owed once the condition is fulfilled. For since a condition can produce an obligation even from the act of an uncertain person, such as: 'If anyone goes up to the Capitol, do you promise to give ten?' or 'If anyone demands ten from me, do you promise to give that amount?', no reason can be given why the same should not be answered also in the case of a promised dowry.
§45.1.108.1Nulla promissio potest consistere, quae ex uoluntate promittentis statum capit.
No promise can be valid which takes its force from the will of the promisor.