俱舍論記 5.191

5.191

「又住用息至更無所為」者，此即雙破異、滅二相。又住用息，異、滅本法自然不住落謝過去，異、滅二相何處起用？復有何事須二用耶？由住攝持，諸法生已暫時不滅，可須此住。住用既捨，法定不住，即自然滅落謝過去，故異、滅用更無所為。既無所用，何須彼二？此責無用。

Regarding "Furthermore, when the operation of stationariness ceases ... they have nothing further to do": This refutes both characteristics, alteration and cessation, together. Furthermore, when the operation of stationariness ceases, the original phenomenon of alteration and cessation naturally does not abide and lapses into the past; where would the two characteristics of alteration and cessation initiate their operations? And what function is there that requires their two operations? Through the sustenance of stationariness, phenomena having arisen temporarily do not cease; one might require this stationariness. But once the operation of stationariness is abandoned, the phenomenon definitely does not abide, but naturally ceases and lapses into the past; therefore, the operations of alteration and cessation have nothing further to do. Since they have no function, why are those two needed? This faults their lack of function.