《隋书·列传·卷六》
往年将要征讨，以完成先皇大业，凡是我问到的人，都各尽心怀，只有苏威不表心意，于是无所回答。
昔岁薄伐，奉述先志，凡预切问，各尽胸臆，而威不以开怀，遂无对命。
In previous years, when there were campaigns about to be launched to complete the grand undertaking of the previous emperor, everyone I asked gave their all, only Su Wei did not show his will, only replying that he had none.