瑜伽論記 19.266

19.266

七有為苦無為門中，真如唯為對治令諸行寂靜相所緣義，故是無為，然真如非對治智今諸行寂靜相義。又釋，真如是諸行寂靜相釋滅義，諸行寂靜相釋滅是相所攝。

Seventh, within the section on conditioned, suffering, and unconditioned: tathatā is unconditioned solely in the sense of being the objective support for the antidote causing the sign of tranquility among conditioned phenomena; however, tathatā is not the meaning of the antidotal gnosis causing the sign of tranquility among conditioned phenomena. Another explanation: tathatā is the sign of tranquility among conditioned phenomena that explains the meaning of cessation; that which is the sign of tranquility among conditioned phenomena explaining cessation is subsumed under signs.