《宋史·本纪·卷一》
十九日，擅州、攫州、曹州、绛州发生蝗灾，太祖命令用牛羊猪三牲祭祀。
己亥，澶、濮、曹、绛蝗，命以牢祭。
On the 19th day, locust plagues occurred in the states of Shan, Jue, Cao, and Jiang. The founding emperor ordered the sacrifice of cattle, sheep, and pigs.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 己亥，澶、濮、曹、绛蝗，命以牢祭。 [/INST] On the 19th day, locust plagues occurred in the states of Shan, Jue, Cao, and Jiang. The founding emperor ordered the sacrifice of cattle, sheep, and pigs.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 己亥，澶、濮、曹、绛蝗，命以牢祭。
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On the 19th day, locust plagues occurred in the states of Shan, Jue, Cao, and Jiang. The founding emperor ordered the sacrifice of cattle, sheep, and pigs.
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