《魏书·列传·卷七十九》
太和二十二年，高祖到悬瓠，他的病情加剧，就派驿马急召徐謇，令他从水路赶赴高祖所在地，一天一夜赶了数百里，到达以后，诊断观察，处方治病，果然疗效显著。
二十二年，高祖幸悬瓠，其疾大渐，乃驰驿召謇，令水路赴行所，一日一夜行数百里。至，诊省下治，果有大验。
In the twenty second year of Taihe, Emperor Gaozu went to Xuanhu, his health worsened, so he sent an express message for Xu Qian, and ordered him to travel by water to get to the Emperor’s location. He travelled several hundred li, day and night, and after he had arrived, he examined the illness, gave a prescription, and treated the disease. As expected, it was very effective.