《隋书·列传·卷十》
当时卫士都佩带火燧，杨勇于是令工匠做了几千枚，准备赐给身边的卫士侍从。
于时卫士皆佩火燧，勇因令匠者造数千枚，欲以分赐左右。
At that time, the guards all wore fire tinderbags, and Yang Yong then ordered the craftsmen to make thousands of them, ready to reward the guards and entourages around him.