釋禪波羅蜜次第法門 2.120

2.120

次正頭頸，令鼻與臍相對，不偏不邪，不低不昂，平面正住。次開口吐胸中穢氣。吐法：開口放氣，自恣而出，想身分中百脈不通處，教悉隨氣而出盡；閉口，鼻中內清氣。如是至三。若身息調和，但一亦足。次當閉口，脣齒纔相拄著，舌向上齶。次當閉眼，纔令斷外光而已。當端身正坐，猶如奠石，無得身首四支竊爾搔動。是為初入禪定調身之法。舉要言之，不寬不急，是身調相。

Next, align the head and neck, making the nose and navel align directly with each other—neither tilted nor crooked, neither drooping nor held too high—facing straight forward and steady. Next, open the mouth and exhale the foul breath from the chest. The method of exhalation: open the mouth and release the breath, letting it emerge freely, visualizing the clogged areas among the hundred vessels within the body as entirely following the breath and being expelled completely; then close the mouth and draw in pure breath through the nose. Do this up to three times. If the body and breath are already harmonious, once is also sufficient. Next, one should close the mouth, with the lips and teeth just touching, and the tongue against the upper palate. Next, one should close the eyes, just enough to shut out the external light and no more. One should hold the body upright and sit correctly, as stable as a base stone, not allowing the body, head, or four limbs to fidget or shift. This is the method for regulating the body upon initial entry into dhyāna-concentration. To state the essential point: being neither loose nor tense is the mark of a regulated body.