《后汉书·列传·西羌传》
汉时他们同匈奴相比，显得相当弱小，但在光武中兴以后，为害边境逐渐严重。
汉世方之匈奴，颇为衰寡，而中兴以后，边难渐大。
In Han times, they were relatively weak compared to the Xiongnu, but after the restoration of Guangwu, they gradually became a serious threat to the border.