大乘起信論廣釋卷第三．四．五 4.124

4.124

[Treatise:] Because they do not understand that [it was spoken] to refute [attachments, they cling to the view that the nature of tathatā and nirvāṇa] is merely empty—
[Commentary:] "Explication": This directly explains the characteristic of attachment. Since they do not know it was spoken to refute attachments, they cling literally to the idea that the nature and the attributes of virtues of tathatā and nirvāṇa are ultimately non-existent and annihilated.