《太平广记·卷四·神仙四》
始皇听后觉得一定可以找到这种不死草。就派徐福带着童男童女各三千人，乘着楼船出海去找祖洲。
始皇于是谓可索得，因遣福及童男童女各三千人，乘楼船入海。
After hearing this, Qin Shi Huang thought he could definitely find this immortal grass. He sent Xu Fu with 3000 boys and girls, and they sailed out on a luxury boat to find Zu Zhou.