[MARCIANUS libro secundo regularum. ] §46.3.44.prIn numerationibus aliquando euenit, ut una numeratione duae obligationes tollantur uno momento: ueluti si quis pignus pro debito uendiderit creditori: euenit enim, ut et ex uendito tollatur obligatio et debiti.
[MARCIANUS in the second book of Rules.] In payments, it sometimes happens that by a single payment two obligations are extinguished at the same moment: as, for instance, if someone sells a pledge to the creditor for the debt; for it happens that both the obligation from the sale and that of the debt are extinguished.
item si pupillo, qui sine tutoris auctoritate mutuam pecuniam accepit, legatum a creditore fuerit sub ea condicione, si eam pecuniam numerauerit, in duas causas uideri eum numerasse, et in debitum suum, ut in Falcidiam heredi imputetur, et condicionis gratia, ut legatum consequatur.
Likewise, if a legacy has been left by a creditor to a ward, who accepted a loan of money without the authority of his tutor, under the condition that he pays that money, he is considered to have paid for two causes: both for his own debt, so that it may be credited to the heir in respect of the Falcidian law, and for the sake of the condition, so that he may obtain the legacy.
item si usus fructus pecuniae numeratae legatus fuerit, euenit, ut una numeratione et liberetur heres ex testamento et obliget sibi legatarium.
Likewise, if the usufruct of a sum of money is bequeathed, it happens that by a single payment the heir is both released from the will and binds the legatee to himself.
tantundem est et si damnatus fuerit alicui uendere uel locare: nam uendendo uel locando et liberatur ex testamento heres et obligat sibi legatarium.
The same applies if the heir has been ordered to sell or lease something to someone; for by selling or leasing, the heir is both released from the will and binds the legatee to himself.