瑜伽論記 20.66

20.66

釋飲尿友者，景備同云：有人被打，悶絕在地；有人惡心尿其口中，其人遂活。活已告言，汝飲我尿，是故得活。其人聞已，即入恒河，經六月浸方得入村。以西國人諱觸屎尿，何況肯服。昔來相傳陳棄藥者，是糞，遂取廁清服之，大是非理。言陳棄藥者，謂取他人所棄藥，滓煎煮服之，名陳棄藥。

Explaining the 'friend who drinks urine', Jing and Bei both say: A man was beaten and lay unconscious on the ground; someone with malicious intent urinated into his mouth, and the man then revived. Having revived, he told him, 'You drank my urine, and therefore were revived.' When the man heard this, he entered the Ganges River and soaked for six months before he could enter the village. Because the people of the Western Country taboos touching feces and urine, how much less would they be willing to ingest it. What has traditionally been passed down as 'discarded old medicine' was said to be feces, so they took toilet runoff and ingested it, which is utterly absurd. What is called 'discarded old medicine' refers to taking the medicine dregs discarded by others, decocting them, and ingesting them; this is called discarded old medicine.