《明史·列传·卷二百一十五》
万历三十五年夏天，总督徐三畏上言 ：河套各部落与黄河东边的各部落不同。
三十五年夏，总督徐三畏言： 河套之部与河东之部不同。
In the summer of the thirty-fifth year of the Wanli era, Governor-General Xu Sanwei reported: The tribes in Helan differ from those in the east of Yellow River.