《汉书·志·五行志上》
金是水的宗本，水得其宗本而昌盛，所以说： 五年后陈国就要复国。 
金为水宗，得其宗而昌，故曰 五年陈将复封 。
Metal is the main element of water, and water thrives when it has its main element, so it is said that: Chen state will be restored in five years.