《三国志·蜀书·先主传》
别驾从事蜀郡人张松劝说刘璋说： 曹公兵强马壮天下无敌，如果他借着张鲁的物资以供取蜀地，那又有谁能抵挡他呢？ 
别驾从事蜀郡张松说璋曰： 曹公兵强无敌於天下，若因张鲁之资以取蜀土，谁能御之者乎？ 
Zhang Song, an assistant officer from Shu encouraged Liu Zhang by saying:"Cao Cao has an invincible army and no one can match him. If he uses Zhang Lu's supplies to take the Shu region, who would be able to stop him?"