妙法蓮華經玄義 4.73

4.73

識處，用常三昧者，此定謂識相續不斷為常，此乃定報，非三無為常、化用常、常樂常。例如上（云云）。

For the sphere of consciousness, the permanent samādhi is used: in this concentration, the continuous succession of consciousness is considered permanent; this is merely the retribution of concentration, not the permanence of the three unconditioneds, the permanence of transformative function, or the permanence of the permanent bliss. The analogy is as above, and so on.