《史记·七十列传·范雎蔡泽列传》
他游说诸侯，想侍奉魏王，可是家里非常贫穷，没有办法筹集资金，于是就先去侍奉魏国中大夫须贾。
范雎者，魏人也，字叔。游说诸侯，欲事魏王，家贫无以自资，乃先事魏中大夫须贾。
He lobbied princes, wanted to serve King Wei, however, because his family was poor, there was no way for him to raise funds, thus, he started out by serving Xu Jia, a state official of Wei.