《隋书·帝纪·卷四》
十一月初九，右侯卫将军冯孝慈在清河讨伐张金称，反被张金称打败，孝慈战死。
十一月己酉，右候卫将军冯孝慈讨张金称于清河，反为所败，孝慈死之。
On the ninth day of the 11th month, General Feng Xiaoci of the Right Houwei Guards fought against Zhang Jinchen in Qinghe, but was defeated by Zhang Jinchen. Xiaoci was killed in action.