《资治通鉴·汉纪·汉纪十三》
大宛国王与其群臣商议道： 汉朝离我国很远，而盐中道路艰难，屡屡致人死亡；如从此北路来，有匈奴骚扰；从南路来，没有水草，又往往缺少城郭、食粮。汉朝派数百人作为使团前来，还常因缺乏粮食死亡过半，这怎能派大军前来呢！
宛王与其群臣谋曰： 汉去我远，而盐水中数败，出其北有胡寇，出其南乏水草，又且往往而绝邑，乏食者多，汉使数百人为辈来，而常乏食，死者过半，是安能致大军乎！
The king of Dayuan discussed with his ministers: The Han Dynasty is far away from our country, and the road in Yan is difficult, often leading to death; if you come from the north road, there are Xiongnu harassment; if you come from the south road, there is no water and grass, and there is often a lack of cities and food. The Han Dynasty sent hundreds of people as a delegation, and often more than half of them died due to lack of food. How could it be possible to send a large army here!