《淮南子·地形训》
所以白色的水适宜生玉，黑色的水适宜产磨石，青色的水适宜产碧，赤色的水适宜生朱砂，黄色的水适宜产黄金，清澈的水适宜龟的生存。这样，汾水濛浊而适宜麻的生长，泲水通和适宜麦类作物，黄河水中和适宜豆类生长，洛水轻畅适宜谷类作物，渭水多力适宜黍子生长，汉水重安适宜竹子生长，江水厚仁适宜水稻生长，而平原上的人聪慧适宜播种五谷。
是故白水宜玉，黑水宜砥，青水宜碧，赤水宜丹，黄水宜金，清水宜龟，汾水浊而宜麻，水通和而宜麦，河水中浊而宜菽，雒水轻利而宜禾，渭水多力而宜黍，汉水重安而宜竹，江水肥仁而宜稻。平土之人，慧而宜五谷。
White water is suitable for producing jade, black water is suitable for producing whetstones, green water is suitable for producing turquoise, red water is suitable for producing cinnabar, yellow water is suitable for producing gold, and clear water is suitable for supporting turtles. In this way, the silt in the Fen River is ideal for growing hemp, the clear waters of the Xixi River are good for crops, the temperate waters of the Yellow River are suitable for beans, the gentle current of the Luo River is ideal for cereals, the powerful waters of the Wei River are good for millet, the tranquil waters of the Han River are ideal for bamboo, the abundant waters of the Yangtze River are good for rice, and the intelligent people of the plains are good at planting grains.