【三人成虎】〖sn rén chéng h〗[Three people spreading reports of a tiger make you believe there is one around; A lie, if repeated often enough, will be accepted as truth; A repeated slander makes others believe]

三街六市小道多，

人言可畏怕传播。

成帮结队漫天谎，

虎子狼孙脏水泼。