《韩非子·喻老》
失去权势叫做轻，离开君位叫做躁，因此他被囚禁，被活活饿死了。
无势之谓轻，离位之谓躁，是以生幽而死。
When a monarch loses power, it is said to be "light", and when he leaves his throne, it is said to be "restless", which is why he was imprisoned and starved to death.