成唯識論述記 6.478

6.478

The Commentary states: This explains the general name. That is, because the six such as greed are the root of the secondary defilements, although they may also receive the name 'secondary defilements,' being subsumed under the roots and not merely having the nature of uniform outflow, they receive the name 'defilements' and are not called 'secondary defilements.' Fascicle seven of the Samuccaya states: All defilements are secondary defilements, but there are secondary defilements that are not defilements. From this it is shown that the roots are named defilements and may also be called 'secondary,' since they also arise following other [causes]. Wrath and so forth are only named secondary and not defilements, because they are not roots.