摩訶止觀 8.100

8.100

次、別運十二息者，謂：上、下、焦、滿、增長、滅壞、冷、煖、衝、持、和、補。此十二息帶假想心。所以者何？若初念入胎，即有報息。隨母氣息兒漸長大，風路滑成，兒息出入不復隨母；生在異處，各各有息，名「報息」。依息者，依心而起，如瞋欲時氣息隆盛，此名「依息」也。前六氣，就報息帶想；今十二息，就依息帶想，故不同前也。

Next, regarding specifically directing the twelve breaths: they are ascending, descending, scorching, filling, increasing, destroying, cold, warm, surging, holding, harmonizing, and tonifying. These twelve breaths are accompanied by an intention of provisional visualization. Why is this? At the initial moment of entering the womb, there is retribution breath. Following the mother's breath, the child gradually grows; once the wind channels are smoothly formed, the child's breathing no longer follows the mother; when born in a different place, each has their own breath, which is called "retribution breath." Dependent breath arises in dependence on the mind, just as when angry or desirous the breath surges strongly; this is called "dependent breath." The previous six vocalizations applied visualization to retribution breath; these twelve breaths apply visualization to dependent breath, and therefore differ from the previous ones.