《资治通鉴·梁纪·梁纪十二》
平原公主明月与南阳王元宝炬是同母兄妹，跟随孝武帝来到关中，丞相宇文泰叫元氏的各位亲王抓住并杀掉了明月；孝武帝对此感到不高兴，有时弯弓射箭，有时用铁椎锤击桌子，由此又和宇文泰产生了隔阂。
平原公主明月，南阳王宝炬之同产也，从帝入关，丞相泰使元氏诸王取明月杀之。帝不悦，或时弯弓，或时椎案，由是复与泰有隙。
Pingyuan Princess Mingyue and Nanyang King Yuan Baoju were children of the same mother, they went to Guanzhong with Xiao Wudi. Prime Minister Yu Wentai had Mingyue captured and killed by Yuan's princes; Xiao Wudi was very angry about it. Sometimes he would bend his bow to shoot arrows, and sometimes he would hit the table with an iron staff, which created a rift between him and Yu Wentai.