《魏书·列传·卷二十三》
如今长皇子托腿尽，年满十二，聪慧通达温良谦和，是众人情感所系，及时登太子之位，是天下的幸运。
今长皇子焘，年渐一周，明睿温和，众情所系，时登储副，则天下幸甚。
Now that the Crown Prince’s legs have fully recovered and he is twelve years old, he is clever, clear-headed, and gentle. He is loved by all and is destined to ascend to the throne. It is the fortune of the world that he will become the crown prince in due course.