大般涅槃經義記 7.203

7.203

「何以故」下是第四段，明其所得，體非常、樂、我、淨法故，所以非大，先徵後辯。問曰：下說二乘涅槃有樂有淨，今以何故說之皆無？此通宣說身智等故，又設分有少故名無。

From "Why is this?" downward is the fourth section, which clarifies that because the substance of their attainment is not the dharmas of permanence, bliss, self, and purity, it is therefore not great; it first questions and then analyzes. Question: Below it says that the nirvāṇa of the two vehicles has bliss and has purity; why is it now said that it has neither of them? This generally refers to the body, knowledge, and so forth; furthermore, even supposing it partially has them, because they are meager, it is called "lacking" them.