成唯識論述記 10.171

10.171

述曰：第三、正相攝門。自性攝可知，餘三或七非自性故。眷屬理通三，三具攝十。

The Commentary states: Third, the section on proper mutual subsumption. Subsumption by intrinsic nature can be understood, because the other three or seven are not the intrinsic nature. In principle, retinue extends to all three; the three fully subsume the ten.