俱舍論記 28.93

28.93

「由此可說至不說想等」者，經部依宗自釋。由此可說：依初五支，減尋、伺二立第二定。減尋、伺、喜三立第三定。減尋、伺、喜、樂四立第四定。即由此道理，初定說五支，擬漸離前支建立後定故。無漸減故，所以不說想等為支。

Regarding the passage "From this it may be stated... conception and the like are not mentioned": The Sautrāntika explains according to his own school: From this it may be stated: Based on the initial five factors, subtracting the two—investigation and scrutiny—the second absorption is established. Subtracting the three—investigation, scrutiny, and joy—the third absorption is established. Subtracting the four—investigation, scrutiny, joy, and pleasure—the fourth absorption is established. Precisely by this principle, five factors are spoken of in the first absorption, intending the gradual departure from previous factors to establish subsequent absorptions. Because there is no gradual subtraction [of them], conception and the like are not mentioned as factors.