《史记·七十列传·扁鹊仓公列传》
过了五天，扁鹊再去见桓侯，说： 您的病已在血脉里，不治恐怕会深入体内。 
後五日，扁鹊复见，曰： 君有疾在血脉，不治恐深。 
Five days later, Bian Que saw Duke Huan again. "Your Highness, the disease has entered your blood," he said, "if you don't treat it, the disease will go deeper into your body."