[IAUOLENUS libro undecimo epistularum. ] §19.2.21.prCum uenderem fundum, conuenit, ut, donec pecunia omnis persolueretur, certa mercede emptor fundum conductum haberet: an soluta pecunia merces accepta fieri debeat? respondit: bona fides exigit, ut quod conuenit fiat: sed non amplius praestat is uenditori, quam pro portione eius temporis, quo pecunia numerata non esset.
[JAVOLENUS, Letters, book 11] I sold a farm, it was agreed that, until all the money was fully paid, the buyer should hold the farm on lease at a certain rent: should the rent be treated as discharged once the money is paid? He answered: good faith requires that what was agreed should be done; but he does not pay more to the seller than in proportion to that period of time during which the money had not been paid.