《后汉书·列传·方术列传下》
赵彦推遁甲，教他们以时进兵，一战就打败了贼人，烧了贼人的屯坞，徐州、兖州一时平定夷人。
彦推遁甲，教以时进兵，一战破贼，燔烧屯坞，徐、兗二州，一时平夷。
Zhao Yan calculated the day and month, instructing them to advance at the right time, and they defeated the bandits in one battle, burning their military camp, and pacifying the foreigners in Xuzhou and Yanzhou.