[FLORENTINUS libro octauo institutionum. ] §2.14.57.prQui in futurum usuras a debitore acceperat, tacite pactus uidetur, ne intra id tempus sortem petat.
[FLORENTINUS in the eighth book of the Institutes.] A person who has accepted interest in advance from a debtor is deemed to have tacitly agreed not to demand the principal within that period.
§2.14.57.1Si ex altera parte in rem, ex altera in personam pactum conceptum fuerit, ueluti ne ego petam uel ne a te petatur: heres meus ab omnibus uobis petitionem habebit et ab herede tuo omnes petere poterimus.
If an agreement has been drafted as in rem on one side and in personam on the other, for example, "that I shall not make a claim" or "that a claim shall not be made against you": my heir will have a claim against all of you, and we shall all be able to make a claim against your heir.