《汉书·传·叙传下》
孝文帝的三个儿子被封为王，代孝王、梁孝王、梁怀王，怀王坠马而死没有后继之人，梁孝王深受宠爱。
孝文三王，代孝二梁，怀折亡嗣，孝乃尊光。
The three sons of Emperor Xiaowen were crowned as kings: King of Dai filial piety, King of Liang filial piety, and King of Liang and Huai. King Huai fell from a horse and died without a successor, and King Liang filial piety was deeply favored.