《资治通鉴·汉纪·汉纪七》
是因为土地还有余力没有利用，百姓还有余力没有发挥；可生长谷物的土地还没有全部开垦，山林川泽的财富还没有全部开发，不从事生产而消耗粮食的游民还没有全部回归农业生产。
地有遗利，民有馀力；生谷之土未尽垦，山泽之利未尽出，游食之民未尽归农也。
It is because the land still has spare capacity that has not been utilized, and the people still have spare capacity that has not been exerted. The land that can grow grain has not yet been fully cultivated, the wealth of mountains, forests, and rivers has not yet been fully developed, and the vagrants who do not engage in production and consume food have not yet returned to agricultural production.