《孟子·滕文公章句上·第四节》
曾子说： 不可以就像曾经用江汉的水清洗过，又在秋天的太阳下曝晒过，洁白无暇。
曾子曰： 不可。江汉以濯之，秋阳以暴之，皜皜乎不可尚已。 
Zengzi said: No, it cannot be. It's like it was washed by the water of the Jialing River and dried in the autumn sun, leaving it spotless.