《周书·列传·卷二十六》
斛斯征与内史宇文孝伯等坚决请求依葬礼七月下葬，宣帝终究不答应。
征与内史宇文孝伯等固请依礼七月，帝竟不许。
Husi Zheng and the 内史 Yuwen Xiaobo et al. firmly requested to follow the funeral customs and bury the deceased in July. The Emperor Xuan ultimately refused.