金光明最勝王經疏 4.163

4.163

贊曰：無餘大涅槃，即正明法身。淨不淨性，體即真如，名為一味。由無分別智證斯一味，正涅槃因，故能獲得極清淨最無上法身。無餘圓寂，名最清淨。出過因位，唯佛得故。無住通因，雖是清淨，障未盡故，未最清淨。

Commentary: Great nirvāṇa without remainder directly clarifies the Dharma body. The pure and impure natures are in substance tathatā, which is called the 'single taste'. Realizing this single taste through non-conceptual wisdom is the direct cause of nirvāṇa, and therefore he is able to attain the extremely pure, supreme Dharma body. Complete quiescence without remainder is named 'utmost purity'. It transcends the causal stages and is attained only by buddhas. Non-abiding applies to the causes: although it is pure, because hindrances are not yet exhausted, it is not yet the most pure.