俱舍論記 28.63

28.63

「淨等至名至得名為入」者，釋第六、第七句。淨等至名，目諸世間有漏善定，與無貪等自性善諸白淨法相應起故。此等至得淨名，即是第一味相應所味著境。此淨定無間滅，彼味定生。緣過去淨定深生味著，不緣現在，以必不觀自性等故；不緣未來，未曾領故；過去曾領故，偏說過去。爾時雖名出所味定，於能味定得名為入。

Regarding 'The name pure attainment... is said to be entering': this explains the sixth and seventh lines. The name 'pure attainment' designates all worldly, contaminated wholesome absorptions, because they arise associated with intrinsically wholesome white pure dharmas such as non-greed. This attainment obtains the name 'pure', and it is precisely the object savored by the first, tasting-associated state. Immediately after this pure absorption ceases, that tasting absorption arises. Taking past pure absorption as its object, it generates deep craving and attachment; it does not take the present as its object, because it definitely does not contemplate intrinsic nature and the like; it does not take the future as its object, because it has not yet experienced it; having experienced the past, it specifically speaks of the past. At that time, although one is said to emerge from the savored absorption, one is said to enter the savoring absorption.