[IDEM libro quadragensimo septimo ad Sabinum. ] §12.6.25.prCum duo pro reo fideiussissent decem, deinde reus tria soluisset et postea fideiussores quina, placuit eum qui posterior soluit repetere tria posse: hoc merito, quia tribus a reo solutis septem sola debita supererant, quibus persolutis tria indebita soluta sunt.
[THE SAME, On Sabinus, Book 47.] Where two persons had guaranteed ten for a debtor, then the debtor paid three, and afterwards the guarantors paid five each, it was held that the one who paid later could recover three; this is with good reason, because when three had been paid by the debtor, only seven remained due, and when these were fully paid, three were paid as not due.