《礼记·王制》
生在深山谷和长在大河边上的人外表就不一样，他们的风俗习惯也自然两样：有的性情急躁，有的性情迟缓，酸苦甘辛咸，各有偏爱，使用的工具各有不同，穿的衣服也各有所好。
民生其间者异俗：刚柔轻重迟速异齐，五味异和，器械异制，衣服异宜。
People who live in deep mountain valleys and those who grow up along big rivers differ in appearance, and their customs and habits are naturally different: some are quick-tempered, and some are slow; some prefer sour, bitter, sweet, pungent, and salty tastes; the tools they use and the clothes they wear are also different.