《汉书·纪·文帝纪》
文帝下诏说： 农业，是天下的根本，人民所赖以生存的，如果人民不认真从事根本而去流动经商，那么衣食就会缺乏。
诏曰： 农，天下之大本也，民所恃以生也，而民或不务本而事末，故生不遂。
Emperor Wen said in an imperial edict: Agriculture is the foundation of the world, the people's livelihood depends on it. If people quit the foundation and are keen on mobile trading, then they will lack food and clothing.