《国语·周语·单襄公论陈必亡》
所以先王的教诲说： 雨季结束便修整道路，河流干枯便修造桥梁，草木凋谢便储藏谷物，霜降来临使备好冬衣，寒风吹起就修整城郭宫室。 
故先王之教曰： 雨毕而除道，水涸而成梁，草木节解而备藏，陨霜而冬裘具，清风至而修城郭宫室。 
Therefore, the teachings of the former kings said: When the rainy season ends, repair the roads. When rivers dry up, build bridges. When the grass and trees wither, store the grain. When frost falls, prepare winter clothes. When the cold wind blows, repair the city walls and palaces.