《明史·列传·卷三十六》
当初，正统初年，士奇说瓦剌逐渐强盛，将成为边防的祸患，而边防军缺少马匹，恐怕不能抵御。
初，正统初，士奇言瓦剌渐强，将为边患，而边军缺马，恐不能御。
Back then, in the first years of the Zhengtong reign period, Shi Qi said that Wara was becoming stronger and stronger and would become a bane for border defense, and that the army needed horses but did not have enough to resist them.