《宋书·列传·卷八十一》
厅堂大柱上有一个窟窿，刘穆之对他的子侄兄弟和刘秀之说： 你们试试用板栗远远地瞄准这个柱子，如果有哪个能掷进这个窟窿，将来必定当此郡长官。 
事柱有一穿，穆之谓子弟及秀之曰： 汝等试以栗遥掷此柱，若能入穿，后必得此郡。 
There was a hole in the pillar of the hall. Liu Mu said to his nephews, brothers, and Liu Xiu: Try to aim at this pillar from a distance with a chestnut. If you can throw it into this hole, you will definitely be the magistrate of this county in the future.