成唯識論述記 5.873

5.873

述曰：會文有二，如文易知。彼論、此論合開不同。彼論第三，合六為五，根本及隨俱是染故，合為一也。

The Commentary states: Reconciling the texts has two parts, easily known from the text. That treatise and this treatise differ in combining and expanding. The third fascicle of that treatise combines the six into five, because the primary and secondary are both defiled and thus combined into one.