[PAULUS libro decimo ad Sabinum. ] §46.3.21.prSi decem stipulatus a Titio deinde stipuleris a Seio, quanto minus ab illo consecutus sis: etsi decem petieris a Titio, non tamen absoluitur Seius: quid enim, si condemnatus Titius nihil facere potest? sed et si cum Seio prius egeris, Titius in nullam partem liberatur: incertum quippe est, an omnino Seius debiturus sit: denique si totum Titius soluerit, nec debitor fuisse uidebitur Seius, quia condicio eius deficit.
[PAULUS in the tenth book on Sabinus.] If, having stipulated for ten from Titius, you then stipulate from Seius for "whatever less you may obtain from the former": even if you sue Titius for the ten, Seius is nevertheless not released; for what if Titius, having been condemned, is unable to pay anything? But even if you sue Seius first, Titius is not released to any extent; for indeed it is uncertain whether Seius will owe anything at all. Finally, if Titius pays the whole, Seius will not even be deemed to have been a debtor, because his condition fails.