《北史·列传·卷三十二》
安抚内外臣民，崔光最为有力。宣武帝死后两天，广平王元怀抱病入宫，以同母兄弟的身份，直接来到太极殿的西庑下，哀号痛哭，震动宫廷。
帝崩后二日，广平王怀扶疾入临，以母弟之亲，径至太极西庑，哀恸禁内。
Cui Guang played the most important role in appeasing the inside and outside of the imperial court. Two days following the death of Emperor Xuanwu, Guangping Prince Yuan Huai entered the palace despite his illness and as a brother with the same biological mother, rushed to the western wing of Taiji Palace and cried sorrowfully, shaking the palace.