續一切經音義 7.22

7.22

二空（案瑜伽持明儀作諸印契用五輪十波羅蜜五輪謂地水火風空二手各以小指為頭依次輪上經言並二空即並竪二大拇指也經作二腔音苦江反乃羊腔字書寫誤也甚乖經義）。

二空 (Examining the Yoga Vidyādhara rituals, forming the various mudrās uses the five wheels and ten pāramitās; the five wheels are earth, water, fire, wind, and space/emptiness; each of the two hands takes the little finger as the beginning, rising in sequence through the wheels; the sūtra saying "join the two emptinesses" means joining and standing upright the two thumbs; the sūtra wrote 二腔, pronounced 苦 + 江 [qiāng], which is the character for the carcass/ribs of a sheep (yángqiāng), a scribal error; it greatly violates the meaning of the sūtra).