《辽史·本纪·卷二十一》
冬十月初一，任命同知东京留守事侯古为南院大王，保安军节度使奚底为奚六部大王。
冬十月戊戌朔，以同知东京留守事侯古为南院大王，保安军节度使奚底为奚六部大王。
On the first day of October in the tenth month of winter, Hou Gu, the acting administrator of the Tokyo garrison, was appointed as the King of Nanyuan; Xi Di, the Jiedushi of Ba'an Army, was appointed as the King of Xi Liubu.