[ULPIANUS libro sexto fideicommissorum. ] §42.4.15.prIs, qui rem permutatam accepit, emptori similis est: item is, qui rem in solutum accepit uel qui lite aestimata retinuit uel ex causa stipulationis non ob liberalitatem est consecutus.
[ULPIANUS, book six on Fideicommissa.] He who has received a thing by exchange is similar to a buyer; likewise he who has received a thing in lieu of payment, or who has retained it after the valuation of a lawsuit, or who has obtained it under a stipulation not on account of liberality.