大乘義章 1.80

1.80

問曰：相續云何通有無？釋言：相生相續之義，局在於有；接對之續，義通有無。如涅槃法接續生死。

Question: How does continuity extend to existence and non-existence? Explanation: The meaning of mutual production and continuity is restricted to existence; continuity in the sense of contiguous juxtaposition extends in meaning to both existence and non-existence. For example, the dharma of nirvāṇa contiguously continues [after] saṃsāra.