[CELSUS libro quinto digestorum. ] §12.1.32.prSi et me et Titium mutuam pecuniam rogaueris et ego meum debitorem tibi promittere iusserim, tu stipulatus sis, cum putares eum Titii debitorem esse, an mihi obligaris? subsisto, si quidem nullum negotium mecum contraxisti: sed propius est ut obligari te existimem, non quia pecuniam tibi credidi (hoc enim nisi inter consentientes fieri non potest): sed quia pecunia mea ad te peruenit, eam mihi a te reddi bonum et aequum est.
[CELSUS, from the fifth book of the Digests.] If you have asked both me and Titius for a loan of money, and I have ordered my debtor to promise it to you, and you have stipulated with him, thinking that he was the debtor of Titius, are you obligated to me? I hesitate, since indeed you have contracted no business with me; but it is more correct that I should think you are obligated, not because I have lent you the money (for this cannot take place except between consenting parties), but because my money has come to you, and it is good and equitable that it be returned to me by you.