《宋史·列传·卷二百零二》
如果天子无心腹之臣，在他五年一度的例行出巡时，怎能放心抛开千里之外的京城。又要谁来为他守护京城呢？
又曰： 五载一巡狩。 彼无腹心之臣，五载一出，捐千里之畿，而谁与守邪？
If the emperor has no confidant, how can he feel at ease to leave the capital thousands of miles away during his routine five-year tour? And who will guard the capital for him?