成唯識論述記 7.599

7.599

述曰：以是無為非種生故，彼無為可證，非種子果，要現起無漏勝道斷結方得，不由種故。若爾，增上果亦爾，有疎遠非種力所得，亦應不明。

The Commentary states: Because it is unconditioned and not produced by seeds, that unconditioned can be realized, but is not the fruit of a seed; it is obtained only when the noble anāsrava path currently arises and severs the fetters, not through seeds. If so, the same applies to adhipatiphala: there are remote ones not obtained through the power of seeds, which also should not be clarified.