俱舍論記 11.97

11.97

「有餘師說至量無邊際」者，依宗正答。欲界上四天有二師釋，色界四定亦有二釋，如文可知。言第四靜慮量等大千，或說量無邊際者，據積眾多別處量說無總地形。故下論解第四定云「謂彼天處無總地形，但如眾星居處各別。」

Regarding "Other masters say […] the measure is boundless": this provides the correct answer according to the school. As for the upper four heavens of the desire realm, there are explanations from two masters; for the four dhyānas of the form realm, there are also two explanations, which can be understood from the text. When it is said that the fourth dhyāna equals the measure of the great-thousand, or when it is said that its measure is boundless, this is stated based on aggregating the measurements of its many separate places; there is no overall landform. Hence, the treatise below explains the fourth dhyāna, saying: "That is to say, those celestial abodes have no overall landform; they are merely situated separately like clusters of stars."