成唯識論述記 2.543

2.543

述曰：若離第三靜慮欲時，得於一切苦樂受滅，即此真如說名不動；乃至若離無所有處，欲想受不行，即此真如名想受滅。《對法》第二及《瑜伽》第五十三、《顯揚》第一、第十八等說。然《顯揚》亦說：苦樂等無為是暫時離繫。此說二性無為，下三性中通計所執有、無合說。

The Commentary states: When one departs from desire for the third dhyāna, one attains the cessation of all feelings of suffering and pleasure, and this very tathatā is called unshakeability. Up to: when one departs from desire for the sphere of nothingness, perception and feeling do not operate, and this very tathatā is called the cessation of perception and feeling. This is explained in the second fascicle of the Abhidharma-samuccaya-bhāṣya, the fifty-third fascicle of the Yogācārabhūmi-śāstra, and the first and eighteenth fascicles of Prakaraṇāryavācā. However, Prakaraṇāryavācā also states that the unconditioned of suffering and pleasure, etc., is temporary disjunction. Here, unconditioned phenomena are explained under two natures; below, under the three natures, they are explained comprehensively by combining the imagined nature, existence, and non-existence.