菩薩瓔珞本業經 2.31

2.31

「佛子！順忍修道，三界無明疑見，一切無不皆空。八辯功德入五明論，所謂四辯：因、果、內道、外道辯；五論者，內外方道、因果、鬼師無不通達，故名難勝地。

"O Son of the Buddha! Cultivating the path through the forbearance of accord, the avidyā, doubts, and views of the three realms are all entirely empty. Endowed with the merits of the eight eloquences, one enters the treatises of the five sciences. The so-called four eloquences are: eloquence regarding causes, effects, the inner path, and outer paths. The five treatises are: thoroughly penetrating internal and external arts and paths, cause and effect, and spirits and teachers. Therefore it is called the Sudurjayā-bhūmi.