Plutarch, Pomp.  44.3  (ca. A.D. 100): In the meantime, however, Pompeius, in his desire to have Afranius elected consul, was spending large sums on his behalf among the voters in the tribes. They used to actually to go down to Pompeius' gardens to collect their money and the thing became much talked about. (I. Scott-Kilvert, trans.)