維摩經玄疏 3.120

3.120

六、明生兜率陀天者，捨閻浮提報，上生此天，為諸天師，在於彼天，修八勝處。今謂此猶是中忍之位也。

Sixth, clarifying birth in Tuṣita Heaven: relinquishing the retribution body of Jambudvīpa, he is born above in this heaven and serves as a teacher to all the devas, practicing the eight stations of mastery in that heaven. We now maintain that this is still the stage of medium forbearance.