俱舍論記 2.106

2.106

「應知同分至應知亦爾」者，此下辨差別。根是不共，一人之眼必無多人同用此眼而得見色，故根不共。五境容有多人受用，故名為共。由不共故，一起用時名為同分。所餘一切不起用者，望此眼亦同分。彼同分亦爾。由色共故，於此色等起見等者名同分，不見等者名彼同分。

Regarding 'It should be known that sabhāga... should be known to be likewise': below this, the differences are distinguished. Faculties are non-common: the eye of one person certainly cannot be used simultaneously by many people to see visible form; thus faculties are non-common. The five sense objects admit of enjoyment by multiple people; hence they are termed 'common'. Because [the faculty] is non-common, when it once initiates activity it is termed sabhāga. All remaining ones that do not initiate activity, in reference to this eye, are also sabhāga. Tatsabhāga is also like this. Because visible form is common, those who generate seeing and so forth toward this visible form are termed sabhāga, while those who do not see and so forth are termed tatsabhāga.