--- attributed to Lucius Cassius by Cicero, according to Wikipedia:
L. Cassius ille, quem populus Romanus verissimum et sapientissimum iudicem putabat, identidem in causis quaerere solebat, cui bono fuisset?
Lucius Cassius, whom the Roman people used to regard as a most honest and most wise judge, was in the habit of asking time and again in lawsuits: "to whom might it be for a benefit?"
—Cicero: Pro Roscio Amerino, §§ 84, 86
