《明史·列传·卷一百四十九》
当时是夜半时分，篥声四面吹响，天明时，大清部队几万骑兵里里外外把他们围了三重。
夜半，觱篥声四起。旦日，骑数万环之三匝。
It was midnight at the time, and the sound of reed pipes was heard from all sides. At dawn, tens of thousands of Qing cavalry surrounded them in three layers inside and out.