一人传虚， 万人传实

一人传虚， 万人传实 [yī rén chuán xū wàn rén chuán shí]

1. ■ One man tells an idle story and it becomes fact in the mouths of ten thousand.; An idle talk circulated by a single man seems real when bandied about by many.; One man circulates a false story and ten thousand men tell it as a fact.