成唯識論述記 7.290

7.290

述曰：下第二文第六義。三品修別，下修必退，不能速現前，有即命終者，以論下云通後報故，若不命終而還得者，由許有退進還得故。後生彼天不甚光淨，形色不甚廣大，「不甚」之言，於下通故。定當中夭，不滿五百劫。此果雖受四百劫已來仍此品攝，或多分者是中品攝，少分劫者是此品攝。問：若退已生色界彼方坐得，生彼之時光淨等不？答：曰不甚如前此品攝故，退性下性故。

The Commentary states: Below is the second text, the sixth meaning: the distinctions among the three grades of cultivation. One of inferior cultivation will definitely regress and cannot quickly bring it to manifestation. Some die immediately, because the treatise below states that it extends to retribution in subsequent lives. If one does not die and regains it, this is because regression and subsequent regaining are permitted. Later, when born in that heaven, one is not very bright and pure, and one's physical form is not very vast; the words "not very" apply throughout below. One will definitely die prematurely, not fulfilling five hundred kalpas. Although this fruit may be experienced for up to four hundred kalpas, it is still included in this grade; or, the greater part belongs to the middling grade, and the lesser part of kalpas belongs to this grade. Question: If after regressing one is born in the form realm and only then attains it by sitting, when born there is one bright and pure or not? The answer is: not very, as before, because it is included in this grade, being of a regressive nature and an inferior nature.