《天工开物·上篇·乃粒》
耕牛在立春之前耕地时用力过度出了汗，一定要避免淋雨着凉，如果发现要下雨了，就赶紧将耕牛赶进牛棚。
凡牛春前力耕汗出，切忌雨点，将雨则疾驱入室。
When cattle plough the land before the beginning of spring, they sweat due to excessive effort, and care must be taken to avoid getting caught in the rain and getting cold. If rain is imminent, the cattle should be quickly driven into the cowshed.