瑜伽論記 19.51

19.51

第二番中，第一、為離煩惱故趣練若；第二、欲出生死，故出家受別解脫戒；第三、出生死已入涅槃宮名趣涅槃。涅槃之名略有五趣。一者、受是觸影，一切受滅名為無影；二者、相續是身，身滅名為寂滅；後之三名，如文可解。

In the second set: first, in order to leave afflictions, one inclines toward the forest hermitage; second, wishing to escape saṃsāra, one leaves home and receives the prātimokṣa precepts; third, having escaped saṃsāra, one enters the palace of nirvāṇa, which is called 'inclining toward nirvāṇa'. The name of nirvāṇa has, in brief, five inclinations: 1. sensation is the shadow of contact, and the cessation of all sensations is called 'shadowless'; 2. the continuum is the body, and the cessation of the body is called 'tranquil cessation'; the latter three names may be understood as in the text.