《周书·列传·卷五十》
波斯王于其国内有十余所小牙，犹如中原的离宫，每年的四月巡游居住，十月才回来。
王于其国内别有小牙十余所，犹中国之离宫也，每年四月出游处之，十月乃还。
The King of Persia has more than ten small palaces in his country, like the Li Palace in the Central Plains, where he巡游and lives in April each year, and does not return until October.