成唯識論述記 4.713

4.713

述曰：此初無漏既不生故，後時無漏亦應不生，初後無漏既並不生，是則應無三乘道果。自下第二明其斷果。

The Commentary states: Since this initial anāsrava [path] would not arise, subsequent anāsrava [paths] should also not arise; and since neither the initial nor subsequent anāsrava [paths] would arise, there would be no path and fruition of the three vehicles. From here down is the second [part], which explains the fruition of abandonment (prahāṇa-phala).