《隋书·帝纪·卷二》
即位之初，民心不向，众子幼弱，朝内有六王谋反，朝外有三方之乱。
初，得政之始，群情不附，诸子幼弱，内有六王之谋，外致三方之乱。
The people's hearts were turned away from him when Emperor Yang of Sui first ascended the throne. His sons were young and weak, and within the court there were six princes plotting rebellion, while outside the court there were disturbances in three regions.