四分律行事鈔資持記 3.843

3.843

臥法中，《善見》明念起。《三千》，示臥相。《母論》，誡耽睡。二時謂初後夜，一時即中夜。《僧祇》，制晏起。注指前說，即右脇著下，累脚合口等。

Under the Method of Lying Down, the Samantapāsādikā explains the thought of rising. The Three Thousand [Deportments] shows the postures of lying down. The Mātṛkā admonishes against indulging in sleep. The two periods refer to the first and last watches of the night; the one period is the middle of the night. The Mahāsāṃghika-vinaya prohibits waking late. The note refers to the previous explanation, namely resting the right side below, placing the feet together, closing the mouth, and so forth.