《明史·志·卷六十》
适逢开、归发生大水，黄河水涨到商丘，在萧家口决堤，整个黄河完全往南流。
会开、归大水，河涨商丘，决萧家口，全河尽南注。
It happened that there was a flood in Kai and Gui, the Yellow River rose to Shangqiu, broke the embankment at Xiaojiakou, and the entire Yellow River flowed completely south.