《明史·列传·卷九十七》
现在外贼惟有俺答，内贼惟有严嵩，没有内贼不除去，而能除去外贼的。
方今外贼惟俺答，内贼惟严嵩，未有内贼不去，而可除外贼者。
At present, the only external threat is Altan Khan, while the only internal threat is Yan Song; if the internal threat is not eliminated, then it will not be possible to remove the external threat.