《史记·十二本纪·孝文本纪》
十四年冬天，匈奴密谋入边寇掠，攻打朝那边塞，杀死了北地郡的都尉孙印。
十四年冬，匈奴谋入边为寇，攻朝塞，杀北地都尉卬。
In the winter of the 14th year, the Huns conspired to invade the border and attacked the frontier of the Chao Dynasty, killing Sun Yin, the governor of Beidi County.