《礼记·曾子问》
孔子回答说： 世子诞生的那天，卿、大夫、士都跟着摄主到殡宫，脸朝北，站在西阶的南面。
孔子曰： 卿、大夫？士从摄主，北面，于西阶南。
Confucius replied: "On the day the crown prince was born, the ministers, officials and scholars all followed the regency to the funeral palace, facing north and standing on the south side of the west steps."