《资治通鉴·后梁纪·后梁纪二》
冯行袭想要派人代受诏书，李说： 头朝东穿上朝会时的礼服，就是受诏的礼仪了。 
行袭欲使人代受诏，珽曰： 东首加朝服，礼也。 
Feng Xingxi wanted to send someone to receive the imperial edict on his behalf, but Li said, "If you wear your ceremonial robes facing east, that will be sufficient as an act of receiving the edict."