俱舍論疏 21.119

21.119

論「色無色界至除預流果」者，明五時也。以道類智時是得預流果故，後治生得果唯有五時。欲修五品預流果後雖存治生，果闕一故，同五時得。

On the Śāstra's statement: "For the form and formless realms [...] excluding the fruit of the stream-enterer": this clarifies the five times. Because the time of the subsequent knowledge of the path is when the fruit of the stream-enterer is attained, the fruits attained by the subsequent arising of antidotes have only five times. For the five grades of the desire realm, although the arising of antidotes remains after the fruit of the stream-enterer, because one fruit is lacking, they likewise have acquisition at five times.