大日經持誦次第儀軌 1.160

1.160

恒依是住，於後日分亦復如是，初夜、後夜思惟大乘無得間絕。至中夜分以事業金剛如前，被金剛甲敬禮一切諸佛、大菩薩等。次當運心如法供養，而作是念：「我為一切眾生志求大事因緣故，應當覆護是身，少時安寢，非為貪著睡眠之樂。」先當正身威儀，重累二足，右脇而臥。若支體疲懈者，隨意轉側無咎，為令速寤，常當係意在明。又復不應偃臥床上，次於餘日亦如是行之。

Constantly abiding thus, in the later portion of the day it is also likewise: in the early night and the later night, contemplate the Mahāyāna without interruption. Reaching the middle of the night, one employs the karmavajra as before, dons the vajra armor, and reverently prostrates to all the Buddhas, great bodhisattvas, and the rest. Next, one should project the mind to make offerings according to the Dharma, and form this thought: 'Because I aspire to seek the causes and conditions of the great matter for the sake of all sentient beings, I should preserve this body and rest peacefully for a short time, not out of coveting the pleasure of sleep.' One should first rectify one's bodily deportment, rest both feet one atop the other, and lie down on the right side. If one's limbs are weary, one may turn over as one wishes without fault; to ensure one awakens swiftly, one should constantly fix one's mind upon the vidyā. Moreover, one must not lie flat on one's back upon the bed. On subsequent days, one should also practice in this manner.