《资治通鉴·梁纪·梁纪二十二》
尚书左仆射李远说： 从来立世子都是看是否嫡出，不看是否年长，把略阳公宇文觉立为世子，您有什么可疑虑的呢？
尚书左仆射李远曰： 夫立子以嫡不以长，略阳公为世子，公何所疑！
Li Yuan, the Shangshu Left-handed Servant, said: "In the past, when establishing an heir, whether he was a legitimate son was considered, not who was elder. Since you want to make Duke Luoyang, Yuwen Ju, the crown prince, what are you worried about?