《元史·列传·卷九十三》
他们大概知道蒙古朝廷近来有内顾之忧，一定是想乘机进攻。
知朝廷近有内顾之忧，必将肆志于我。
They probably knew that recently the Mongol court had been preoccupied with internal affairs, so they must have wanted to seize this opportunity to attack.