俱舍論疏 26.137

26.137

「論曰至皆通四」，釋也。滅智無三境故唯法。他心智不緣色故唯三。所餘八智境通色、心、心所等故，通四念住。

"The commentary says […] all extend across the four," is the explanation. Because the cognition of cessation lacks the [first] three objects, it is solely dharmas. Because the cognition of another's mind does not take form (rūpa) as its object, it consists of only three. Because the objects of the remaining eight cognitions extend across form, mind, mental factors, and so forth, they extend across the four applications of mindfulness.