釋禪波羅蜜次第法門 6.115

6.115

第五、進退者，得虛空定亦有四種人不同，所謂退分、住分、進分、達分，類如上四禪中說，今不廣明。

Fifth, progression and regression: in attaining the space absorption there are also four kinds of different practitioners, namely those of deteriorating share, sustaining share, progressing share, and penetrating share, similar to what was explained in the four dhyānas above; it is not explained in detail now.