《后汉书·列传·南匈奴列传》
因此匈奴大为恼火，入侵向纵深推进二十年，匈奴就侵掠到上党、扶风、天水。
由是大恨，入寇尤深。二十年，遂至上党、扶风、天水。
This angered the Xiongnu greatly, and they invaded deep into the interior for twenty years, plundering as far as Shangdang, Fufeng, and Tianshui.