大般涅槃經疏 1.25

1.25

'Dwelling place': Fully stated, it should be Kuśinagara. This is untranslated; or translated as 'Corner City', because it has three corners. When the Avataṃsaka says 'south of Corner City', that is this very city. Or it is called 'Straw-Raincoat Grass City', or called 'Mao-Grass City', named because this city was covered in thatch grass. Or it is called 'City of the Ṛṣis'; in ancient times, the ṛṣis had long lifespans and the people respected them, so they named the dwelling place after the persons. The country was also named after the persons, hence it is called the country of Kuśi.