瑜伽論記 5.368

5.368

言中間者，初戒定後所生定慧在無漏定慧之前因，故名中間。顯示最上一種能為涅槃安住因緣者，釋一能趣涅槃漸次為因緣義，因緣義通上兩句故，無漏慧一種三中最上，亦是二因緣所生極果，名為最上。

Regarding 'the intermediate': The absorption and wisdom that arise after the initial morality and absorption are the prior causes before taintless absorption and wisdom, and are therefore termed 'intermediate.' The statement that it shows that the single supreme kind can serve as the cause and condition for stabilizing in nirvāṇa explains the meaning of how the single [training] that is capable of leading to nirvāṇa progressively serves as a cause and condition, because the meaning of 'cause and condition' applies to the preceding two lines as well. The single kind of taintless wisdom is the most supreme among the three; it is also the ultimate fruition produced by the two causes and conditions, and is thus called 'most supreme.'