《周书·列传·卷十》
宇文颢极为孝顺，德皇后去世后，他哀痛异常伤损身体超越了礼制，乡里的人都惊异敬重他。
颢性至孝，德皇后崩，哀毁过礼，乡党咸敬异焉。
Yuwentai was extremely filial, and after Empress De passed away, he was so sad that he hurt his body beyond the etiquette, and the people in the village were surprised and respected him.