《资治通鉴·汉纪·汉纪四十四》
冬季，十月癸丑，因处处有羌人劫掠，凉州震动惊恐，又把安定郡太守府迁到右扶风，把北地郡太守府迁到左冯翊。
冬，十月，癸丑，以羌寇充斥，凉部震恐，复徙安定居扶风，北地居冯翊。
In the winter, on the 10th of October, because there was the looting of the Qiang people everywhere, Liangzhou was shaken with fear, so the prefecture of安定 county was moved to You Fufeng, and the prefecture of 北地 county was moved to Zuo Fuyi.