《旧五代史·后周·太祖纪四》
车驾回宫，到明德楼，宣布诏命 ：大赦天下，改广顺四年为显德元年。
车驾还宫，御明德楼，宣制： 大赦天下，改广顺四年为显德元年。
The Imperial carriage returned to the palace, reaching Mingde Tower. There, a decree was announced: general amnesty in the empire; the fourth year of Guangshun was changed to the first year of Xiande.