《魏书·列传·卷七十》
安丰王元延明，博闻多识，但每有疑难问题，总是找李琰之为其辨析，自以为才识不如李琰之。
安丰王延明，博闻多识，每有疑滞，恆就琰之辨析，自以为不及也。
The King of Anfeng, Yuan Yaming, had extensive knowledge, but whenever he had difficult or doubtful questions, he would always seek Li Yan to clarify them for him, considering himself less capable than Li Yan.