《后汉书·列传·章帝八王列传》
七年，帝就废太子刘庆而立皇太子刘肇。刘肇是梁贵人的儿子。
七年，帝遂废太子庆而立皇太子，梁贵人子也。
In the seventh year, the emperor deposed Crown Prince Liu Qing and established Liu Zhao as the Crown Prince. Liu Zhao was the son of the Noble Consort Liang.