俱舍論記 28.9

28.9

「此總有四至五蘊為性」者，釋初頌。此四靜慮各有二種，謂定及生。生即如前〈世品〉已說。定靜慮體，總而言之是善性攝。能令心王住一境性，剋性出體，以善等持為自性故。若并助伴相應、俱有，五蘊為性。

"These are four in total… having the five skandhas as their nature": this explains the first verse. These four dhyānas each have two kinds, namely meditative absorption and rebirth. Rebirth has already been explained above in the Loka-nirdeśa. The entity of the dhyāna of meditative absorption, broadly speaking, is subsumed under wholesome nature. It is capable of causing the primary mind to dwell in one-pointedness of the object; strictly defining the entity, it has wholesome samādhi as its intrinsic nature. If taken together with its attendants, both conjoined and co-arising, it has the five skandhas as its nature.