[CELSUS libro sexto digestorum. ] §12.1.42.prSi ego decem stipulatus a Titio deinceps stipuler a Seio, quanto minus a Titio consequi possim: si decem petiero a Titio, non liberatur Seius, alioquin nequicquam mihi cauetur: at si iudicatum fecerit Titius, nihil ultra Seius tenebitur.
[CELSUS, from the sixth book of Digests.] If I, having stipulated for ten from Titius, should then stipulate from Seius for whatever less I might be able to recover from Titius: if I sue Titius for ten, Seius is not released, otherwise my security would be in vain. But if Titius satisfies the judgment, Seius will be liable for nothing further.
sed si cum Seio egero, quantumcumque est quo minus a Titio exigere potuero eo tempore, quo iudicium inter me et Seium acceptum est, tanto minus a Titio postea petere possum.
However, if I sue Seius, whatever is the amount by which I was unable to recover from Titius at the time when the joinder of issue was accepted between me and Seius, by so much less can I afterwards sue Titius.
§12.1.42.1Labeo ait, cum decem dari curari stipulatus sis, ideo non posse te decem dare oportere intendere, quia etiam reum locupletiorem dando promissor liberari possit: quo scilicet significat non esse cogendum eum accipere iudicium, si reum locupletem offerat.
Labeo says that when you have stipulated for "ten to be taken care of to be given," you cannot therefore maintain that "he ought to give ten," because the promisor can be released even by providing a solvent debtor. By this, of course, he means that the stipulator is not to be compelled to accept a trial if the promisor offers a solvent debtor.