瑜伽論記 1.339

1.339

十一、行相，惡業眼視下淨者，生三惡趣；雖見生處，見其勝淨，所以欣生；若見穢相，不欣生。故俱舍云：天首上三橫，地獄頭歸下。此文并說地獄為面視於下，非頭不向下，但與餘二趣，視下相似，故同說之。

Eleventh, its manner of movement: one with evil karma whose eyes gaze downward purely is born in the three evil destinies; although it sees the place of birth, it sees it as supremely pure, and for that reason rejoices in being born; if it saw foul characteristics, it would not rejoice in being born. Therefore, the *Kośa* says: 'Devas have their heads upward, the three [middle destinies move] horizontally, and hell beings have their heads facing downward.' This text together describes hell beings as having their faces gazing downward, not that their heads do not point downward; it is just that their downward gaze is similar to the other two destinies, and so they are described together.