大般涅槃經集解 46.88

46.88

案僧亮曰：法在終滅，始終體滿，得受有名。此之有者，本無今有，故無常也。僧宗曰：本無今有之性，其義不常，以是壞故，壞亦無常也。

Sengliang says: When a dharma ends in extinction, its substance from beginning to end is complete and can receive the name of existence. This existence is originally non-existent and now existent, and is therefore impermanent. Sengzong says: The nature of being originally non-existent and now existent is not permanent in its meaning; because it is decay, decay is also impermanent.