摩訶止觀 8.76

8.76

三、坐禪不節：或倚壁、柱、衣服，或大眾未出而臥，其心慢怠，魔得其便，使人身體背瘠骨節疼痛，名為「注病」，最難治也。

Third, lack of moderation in seated meditation: leaning against walls, pillars, or clothes, or lying down before the assembly has departed, with a slack and negligent mind—māras seize the opportunity to cause a person's body and spine to become emaciated and the joints to ache; this is called 'fixed affliction' (zhu-bing), and is the most difficult to cure.