[IDEM libro nono responsorum. ] §38.1.42.pr'Cerdonem seruum meum manumitti uolo ita, ut operas heredi promittat'. non cogitur manumissus promittere: sed etsi promiserit, in eum actio non dabitur: nam iuri publico derogare non potuit, qui fideicommissariam libertatem dedit.
[BY THE SAME AUTHOR, in his ninth book of Opinions.] 'I wish my slave Cerdo to be manumitted in such a way that he promises services to the heir.' The manumitted person is not compelled to promise; but even if he has promised, no action will be granted against him; for he who granted the trust-bequeathed freedom could not derogate from public law.