釋禪波羅蜜次第法門 5.123

5.123

答曰：不然。前已受名，故不應重說。又且虛空離色界，但發定之時而無支林等法生，故不說離生。

Answer: Not so. It has already received its name earlier, so it should not be stated repeatedly. Moreover, space is detached from the form realm, but when its samādhi manifests, there are no factors such as limbs and branches that arise, so it is not called 'born of detachment'.