俱舍論疏 2.53

2.53

論「尋一切時至但伺相應故」，第三明尋也。有尋之處必有伺故，尋唯有伺。無第二尋故，不名有尋。此意說：伺聚起時無第二伺故不相應。受等亦爾，雖有二三受同聚起時，無第二受等，故不相應。《正理》不應以二受為例，應錄《正理》於前。

On the Śāstra's: "Vitarka at all times... because it is associated only with vicāra": this is the third part, clarifying vitarka. Wherever there is vitarka there is necessarily vicāra, so vitarka has only vicāra. Because there is no second vitarka, it is not called having vitarka. The meaning here is: when vicāra arises in the mental group, because there is no second vicāra, it does not associate [with itself]. Sensation and the like are also like this: although two or three sensations might belong to the same category, when one arises there is no second sensation or the like, and hence they do not associate with themselves. The Nyāyānusāra should not have used two sensations as a parallel; the Nyāyānusāra should be recorded as before.