《辽史·本纪·卷二十四》
夏四月初一，大雪，平地堆起丈余，马匹死去十分之六、七。
夏四月丙午朔，大雪，平地丈余，马死者十六七。
On the first of the first month of summer, a heavy snow fell, accumulating several metres in the open, killing six or seven out often horses.