唯識二十論述記 2.317

2.317

末蹬伽者，舊云迦陵伽，此云憍逸，仙人之名。舊云王名，有梵本云鉢蹬伽，此翻云蛾，即赴火者。昔有仙人形甚醜陋，世間斯極，修得五通，山中坐禪。有一婬女甚愛於王，王亦愛之，後觸忤王，王遂驅出。婬女入山，見仙醜陋，謂是不祥之人，恐有不祥之事。婬女切念：我今被出，是不吉祥，若還此不祥，我應吉祥，乃取糞穢洗不淨汁，令婢送山，澆灌仙人，仙人忍受，不生瞋恨。有婆羅門為仙洗浣，婬女自後王還寵之。

As for "Mātanga", an older [version] has "Kaliṅga", which is translated here as "arrogant and reckless", the name of an ascetic. An older [account] says it is a king's name. A Sanskrit manuscript has Pataṅga, translated here as "moth", namely that which flies into the fire. Formerly, there was an ascetic whose appearance was extremely hideous, the most extreme in the world. Having cultivated and attained the five supernormal knowledges, he sat in dhyāna in the mountains. There was a courtesan who was deeply beloved of the king, and the king also loved her. Later she offended the king, who then drove her out. The courtesan entered the mountains and, seeing the ascetic's hideousness, thought he was an inauspicious person and feared some misfortune. The courtesan thought earnestly: "My being cast out now is inauspicious; if I return this inauspiciousness [to him], I should become auspicious." She then took filthy wash water contaminated with excrement and sent a maidservant up the mountain to douse the ascetic with it. The ascetic endured it patiently without giving rise to anger. A brahmin washed and cleaned the ascetic. After that, the king restored his favor to the courtesan.