《魏书·帝纪·卷五》
又在苑囿内获得一寸见方的玉印，文字为 子孙长寿 ，群公卿士都说 美哉 这哪仅是我一人能引起这种感应，实在是由天地祖宗降福所导致的。
又于苑内获方寸玉印，其文曰 子孙长寿 。群公卿士咸曰 休哉 ！岂朕一人克臻斯应，实由天地祖宗降祐之所致也。
"Besides, I have acquired a jade seal measuring one inch square in the imperial park. The words on it read 'May the descendants live long'. All high-ranking officials and scholars exclaimed, 'How great!' This could not have been brought about merely by me; in fact, it was due to the blessings descended by the heaven, the earth, my ancestors, and my predecessors."