瑜伽論記 22.155

22.155

此中已下第二番解，已滅壞者由無常故說之為苦，此過去也，已生起者滅壞法故亦說為苦，此說現在，此滅壞法至亦名為苦等，賴耶捨受體是滅壞之法，或時苦苦所隨，或時樂受壞苦隨逐，與此二苦隨一并生，名相應故，此捨受亦名為苦。

From "Herein..." onward is the second round of explanation: that which is already perished and deteriorated is spoken of as suffering on account of impermanence—this refers to the past. That which is already arisen is also spoken of as suffering because it is a phenomenon subject to deterioration—this refers to the present. "This phenomenon subject to deterioration... is also called suffering, etc.": the equanimous feeling of the ālaya[-vijñāna] in its substantial nature is a phenomenon subject to deterioration; sometimes it is pursued by the suffering of suffering, and sometimes it is pursued by the suffering of change of pleasant feelings. When it arises together with either of these two sufferings, it is designated as conjoined; therefore, this equanimous feeling is also called suffering.