《隋书·列传·卷二十六》
宇文述想为他求官，对他说： 你所监制的兵器，都合乎皇上的心，但不得当官，是因为长宁兄弟还没有死。 
述欲为之求官，谓定兴曰： 兄所制器仗并合上心，而不得官者，为长宁兄弟犹未死耳。 
Yu Wen Shu wanted to ask for an official position for him, and said to him: The weapons you supervised are all in line with the emperor's wishes, but you are not eligible for an official position because the brothers of Chang Ning have not yet been executed.