續一切經音義 2.21

2.21

跏趺（上音加下音府無反三蒼云趺謂足趺也鄭注儀禮云足上也案瑜伽儀有降魔吉祥之坐其跏字只合單作加先以右足趺加於左䯗上又以左足趺加於右䯗上令二足掌仰此名降魔坐又吉祥坐先以左足趺加右䯗上准前應知此乃吉祥坐為上其降魔坐次也）。

Cross-legged sitting (跏趺) (The first [character] has the sound jiā. The second has the sound of the fanqie fǔ + wú [fū]. The Sancang states: 'Fū refers to the instep of the foot.' Zheng [Xuan]'s commentary on the Yili states: 'The top of the foot.' According to Yoga rituals, there are the posture for subduing Māra and the auspicious posture. The character jiā (跏) should properly be written simply as jiā (加). First placing the right instep on the left thigh, and then placing the left instep on the right thigh, causing the two soles to face upward: this is named the posture for subduing Māra. As for the auspicious posture, first place the left instep upon the right thigh, and understand the rest by analogy with the preceding. Thus the auspicious posture is superior, and the posture for subduing Māra is secondary).