大般涅槃經集解 64.34

64.34

案僧亮曰：此下別答也。法身有真有應，真身是常、應身無常。或者見應滅，謂真亦滅。聞真身常，謂應身亦常，所以起諍也。寶亮曰：佛此二說，皆各有為，但執者乖衷，是以成諍。此釋第一諍論。

Sengliang comments: From here below is the specific answer. The dharmakāya has the true and the responsive: the true body is nitya, while the responsive body is anitya. Confused people, seeing the extinction of the responsive [body], say that the true [body] is also extinguished. Hearing that the true body is nitya, they say that the responsive body is also nitya; this is why dispute arises. Baoliang comments: The Buddha's two teachings each had their own purpose, but those who cling to them deviate from the mean, and thus dispute arose. This explains the first disputatious argument.