俱舍論疏 28.101

28.101

「論曰至即五實事」，明初靜慮支。五各有別體，即有五實事。一尋、二伺、三喜、四輕安、五等持。

"The treatise says [...] are five real entities": this explains the factors of the first dhyāna. Since the five each have distinct entities, there are five real entities: first, vitarka; second, vicāra; third, joy; fourth, pliancy; fifth, samādhi.