瑜伽師地論略纂 11.128

11.128

論清淨靜慮有十種中，第七云「捨靜慮已，復還證入自在淨靜慮」者，問曰：此與第六何別？義曰：第六順入、住、出自在，第七逆入、住、出自在，故有別也。故論云捨靜慮已，還復證入。

Among the ten kinds of pure dhyāna in the treatise, the seventh says: "having relinquished dhyāna, again attaining mastery in pure dhyāna upon re-entering it." Question: How does this differ from the sixth? The interpretation is: the sixth is mastery in forward entering, abiding, and emerging; the seventh is mastery in reverse entering, abiding, and emerging; therefore there is a difference. Thus the treatise says that having relinquished dhyāna, one re-enters it.