維摩經玄疏 2.172

2.172

第七、三觀通此經文者，即為三意：一，釋室外；二，釋室內；三，釋出室。

Seventh, the threefold contemplation penetrating the text of this sūtra: this has three meanings: first, explaining outside the room; second, explaining inside the room; third, explaining exiting the room.