《资治通鉴·晋纪·晋纪四十》
后秦鲁公姚绍派长史姚洽、宁朔将军安鸾、护军姚墨蠡、河东太守唐小方，率领二千人驻军黄河北岸的九原，依据黄河天险，打算切断檀道济军队的粮草供应。
秦鲁公绍遣长史姚洽、宁朔将军安鸾、护军姚墨蠡、河东太守唐小方帅众三千屯河北之九原，阻河为固，欲以绝檀道济粮援。
Yao Shao, the Duke of Lu of the Later Qin, sent historian Yao Qia, General An Luan of Ningshuo, protector Yao Moli and Tang Xiaofang, the prefect of Hedong, to lead two thousand soldiers to station at Jiuquan on the north bank of the Yellow River, using the natural danger of the Yellow River to cut off the supply of food for Tan Daoji's army.