大般涅槃經集解 2.11

2.11

案：亦曰拘尸那竭國，亦曰拘尸那城。法瑤曰：仙人名也。將顯長仙久壽也，兼遣著常之病。丈六尚然，況凡夫耶。僧宗曰：據方所以證非謬也。

I note: It is also called the kingdom of Kuśīnagara, or the city of Kuśīnagara. Fayao says: "It is the name of an immortal. It is intended to manifest long-living immortals and protracted lifespan, while concurrently dispelling the illness of clinging to permanence. If the sixteen-foot [body] is still like this, how much more so ordinary mortals?" Sengzong says: "Relying on the place verifies that it is not mistaken."