《资治通鉴·后周纪·后周纪一》
太祖因为李主管的业务繁多紧急，便催促他入朝，李以不能行朝拜大礼为理由推辞。
帝以谷职业繁剧，趣令入朝，辞以未任趋拜。
Because Li’s job was urgent and there were a lot of things to do, Emperor Taizu urged him to attend the court, but Li declined on the grounds that he couldn’t perform the ritual kowtow.