《明史·列传·卷九十》
仇鸾请求调宣、大两处的兵力到京都守卫，聂豹陈述四种忧虑，并说宜固守宣府、大同两地，宣府、大同安则京师安。
仇鸾请调宣、大兵入卫，豹陈四虑，谓宜固守宣、大，宣、大安则京师安。
Qiu Luan asked to dispatch troops from Xuanfu and Datong to Beijing to defend the city, but Nie Bao expressed four worries, and said that it would be better to stick to the defense of Xuanfu and Datong, and as long as Xuanfu and Datong were safe, the capital would be safe.