《史记·七十列传·李斯列传》
丞相的大儿子李由担任三川郡守，楚地强盗陈胜等人都是丞相故乡邻县的人，因此他们才敢公开横行，经过三川时，李由只是守城而不出击。
丞相长男李由为三川守，楚盗陈胜等皆丞相傍县之子，以故楚盗公行，过三川，城守不肯击。
The Chancellor's eldest son, Li You, serves as the Governor of Sanchuan County. The strong bandits of the Chu region, Chen Sheng and others, are all people from the county next to the Chancellor's hometown. That is why they dared to rampant publicly. When passing through Sanchuan, Li You only guarded the city without attacking.