《后汉书·列传·章帝八王列传》
◆章帝八王传，孝章皇帝八个儿子：宋贵人生清河孝王刘庆，梁贵人生和帝刘肇，申贵人生济北惠王刘寿、河间孝王刘开。其余四王不记母氏姓名。
孝章皇帝八子：宋贵人生清河孝王庆，梁贵人生和帝，申贵人生济北惠王寿、河间孝王开，四王不载母氏。
◆Records of Emperors' Sons in the Chapter of Emperor Zhang: Emperor Xiao Zhang has eight sons: Lady Song's son was Liu Qing, who was Xiao King of Qinghe; Lady Liang's son was Emperor He Liu Zhao; Lady Shen's son was Liu Shou who was Hui King of Jibei; Liu Kai, who was Xiao King of Hejian; for the other four sons, the name of the mother is not recorded.