瑜伽師地論略纂 8.125

8.125

論解苦苦中，以七苦為苦苦故者，據實為論；餘處唯說前五為苦苦者，以從增上苦說苦苦。第八苦通三苦，可會之，此以通三受，苦取蘊也。

In the treatise's explanation of the suffering of suffering, taking seven sufferings as the suffering of suffering is stated in terms of actual reality; elsewhere, only the first five are stated to be the suffering of suffering, speaking of the suffering of suffering in terms of predominant suffering. The eighth suffering extends across the three sufferings and should be reconciled accordingly; this takes the suffering aggregates of clinging as extending across the three feelings.