修習止觀坐禪法要 1.69

1.69

次當口吐濁氣，吐氣之法，開口放氣，不可令麁急，以之綿綿，恣氣而出，想身分中百脈不通處，放息隨氣而出。閉口，鼻納清氣。如是至三。若身息調和，但一亦足。

Next, expel the turbid breath through the mouth. The method of expelling breath: open the mouth and release the breath, not letting it be coarse or abrupt, but continuous and unbroken, letting the breath go out as it will; imagine the places in the body where the hundred channels are blocked, letting the breath follow out and be released. Close the mouth and draw in pure breath through the nose. Do this up to three times. If the body and breath are harmonized, just once is sufficient.