[ULPIANUS libro undecimo ad edictum. ] §19.1.32.prSi quis a me oleum quod emisset adhibitis iniquis ponderibus accepisset, ut in modo me falleret, uel emptor circumscriptus sit a uenditore ponderibus minoribus, Pomponius ait posse dici uenditorem sibi dare oportere quod plus est petere: quod habet rationem: ergo et emptor ex empto habebit actionem, qua contentus esse possit.
[ULPIAN, On the Edict, Book XI.] If anyone has accepted from me the olive oil which he had bought, using unfair weights in order to deceive me in the quantity, or if a buyer has been defrauded by the seller with lighter weights, Pomponius says it can be held that the seller can claim that what is in excess ought to be given to him; and this is reasonable. Therefore, the buyer also will have an action on the purchase, with which he can be satisfied.