大般涅槃經集解 46.84

46.84

案僧亮曰：住亦是有，有亦應常；以先後二生故，住亦無常也。僧宗曰：此住為生來生其體，故不得恒住，所以無常也。

Sengliang says: Abiding is also existent, and existence should also be permanent; yet because of the two births, prior and posterior, abiding is also impermanent. Sengzong says: This abiding has its substance brought into being by birth, so it cannot abide permanently; this is why it is impermanent.