《明史·志·卷四十四》
世宗初年，开垦西苑的闲地为田，建造殿名无逸，亭名豳风，又建亭名省耕，名省敛，每年耕种收获季节，皇帝总是亲临观看。
世宗初，垦西苑隙地为田，建殿曰无逸，亭曰豳风，又建亭曰省耕，曰省敛，每岁耕获，帝辄临观。
In the early years of the Shizong era, the wasteland in the Western Garden was reclaimed and cultivated, and a palace named Wuyi, a pavilion named Binfeng, and other pavilions named Shenggeng and Shenglian were built. Every year during the ploughing and harvesting season, the emperor came to watch in person.