俱舍論記 1.263

1.263

「頌曰至一名為法處」者，就頌答中，以四義簡：一為差別，通釋色處、法處；二最勝，別釋色處；三攝多法；四攝增上法，別釋法處。

Regarding [the text from] “The verse says …” to “… one is called the dharma-āyatana,” within the verse answering, it distinguishes by four meanings: first, for distinction, generally explaining the rūpa-āyatana and dharma-āyatana; second, the most preeminent, specifically explaining the rūpa-āyatana; third, subsuming many dharmas; fourth, subsuming predominant dharmas, specifically explaining the dharma-āyatana.