[IDEM libro quarto decimo digestorum. ] §17.1.31.prSi negotia mea mandauero gerenda ei, qui mihi actione in quadruplum tenebatur, post annum uero in simplum, etsi post annum cum eo mandati agam, praestare mihi quadruplum debebit: nam qui alterius negotia administranda suscipit, id praestare debet in sua persona, quod in aliorum.
[THE SAME in the fourteenth book of his Digests.] If I commission someone to manage my affairs who was liable to me in an action for a fourfold amount, but after a year only for a single amount, then even if I bring an action of mandate against him after a year, he will be obliged to pay me the fourfold amount; for he who undertakes to manage the affairs of another must perform in his own person that which he must perform in the case of others.