俱舍論疏 1.237

1.237

論「若不爾者至應知應斷」，反難釋也。若依經文唯六思身為行蘊者，即有為法中除色、受、想、識外餘有為法，非取蘊攝故，即非苦、集諦。既非苦、集，即不可為應知、應斷。

On the passage in the treatise from "If it were not so" to "should be known and should be severed": Explanation by objection. If, relying on the sūtra text, only the six classes of intention were the volition skandha, then among conditioned phenomena, the remaining conditioned phenomena besides form, feeling, conception, and consciousness would not be subsumed under the grasping skandhas, and therefore would not be the truths of suffering and origin. Since they would not be suffering and origin, they could not be what should be known and what should be severed.