[ULPIANUS libro trigensimo octauo ad edictum. ] §38.1.15.prLibertus, qui post indictionem operarum ualetudine impeditur, quo minus praestet operas, non tenetur: nec enim potest uideri per eum stare, quo minus operas praestet.
[ULPIANUS, in the thirty-eighth book on the Edict.] A freedman who, after the announcement of the services, is prevented by ill health from rendering them, is not liable; for it cannot be considered to be due to his own fault that he does not render the services.
§38.1.15.1Neque promitti neque solui nec deberi nec peti pro parte poterit opera.
A service can neither be promised, nor performed, nor owed, nor demanded in part.
ideo Papinianus subicit: si non una, sed plures operae sint et plures heredes existant patrono qui operas stipulatus est, uerum est obligationem operarum numero diuidi.
Therefore, Papinian adds: if there is not just one, but several services, and several heirs of the patron who stipulated for the services exist, it is true that the obligation of the services is divided by number.
denique Celsus libro duodecimo scribit, si communis libertus patronis duobus operas mille daturum se iurauerit aut communi eorum seruo promiserit, quingenas potius deberi, quam singularum operarum dimidias.
Finally, Celsus writes in his twelfth book that if a common freedman has sworn that he will give one thousand services to two patrons, or has promised them to their common slave, five hundred each are owed rather than halves of individual services.