《水经注·卷十五》
戴延之《西征记》叫八关泽，就是《水经》所说的散关。城墙从南山横跨洛水，往北直到黄河，这一带都是关隘要塞，是杨仆家的憧仆所筑。
戴延之《西征记》谓之八关泽，即《经》所谓散关，鄣自南山，横洛水，北属于河，皆关塞也，即杨仆家僮所筑矣。
Dai Yanzhi's "Western Expedition" called the Eight Customs Marsh, which is the Sanguan mentioned in "Shui Jing". The city wall spans the Luo River from the South Mountain and goes north to the Yellow River. This area is a pass fortress built by Yang Pu's family.