《北史·本记·卷十二》
夏四月初二，下诏说： 古代帝王观风俗，都以此显示为万众忧虑，安抚远荒之人。
夏四月庚辰，诏曰： 古者帝王观风俗，皆所以忧勤兆庶，安集遐荒。
On the second day of the fourth month, an imperial edict was issued, in which it was stated: In ancient times, emperors would personally observe folk customs in order to show that they were concerned about the people and to pacify those living in remote and desolate lands.