《隋书·列传·卷四十三》
直到宇文护被杀，查抄他的书信、札记时，武帝亲临检查。凡是有假托天命，胡乱编造异端邪说的人，全被杀戮。
及护灭之后，阅其书记，武帝亲自临检，有假托符命，妄造异端者，皆致诛戮。
It was not until Yuwen Hu was killed and his letters and notes were searched that Emperor Wu came to inspect them in person. Anyone who had falsely claimed to have a divine mandate and fabricated heresies was put to death.