《后汉书·列传·虞傅盖臧列传》
当时中常侍张防滥用权势，收受贿赂。虞诩依法追究，但往往遭到扣压，不得上报。
时，中常侍张防特用权势，每请托受取，诩辄案之，而屡寝不报。
At that time, Zhang Fang, the eunuch Zhongchang, abused his power and accepted bribes. Yu Xu pursued him in accordance with the law, but was often detained and could not report it.