《辽史·本纪·卷二十九》
秦晋王耶律淳之妻萧德妃五次上表于金，请求册立秦王，金主不肯，德妃便派精兵把守居庸。
秦晋王淳妻萧德妃五表于金，求立秦王，不许，以劲兵守居庸。
Princess Consort Xiao De, the wife of Emperor Qinjind Yelu Chun, sent a memorial to the Jin court five times, requesting the enthronement of Emperor Qin. The Jin emperor refused. Princess Consort Xiao De then sent an elite army to guard Juyongguan.