一切經音義 1.102

1.102

兩膝（骨逸反玉篇膝脛上頭也說文脛頭骨節也正體從卪作䣛卪音節桼音七經從肉作膝時用字也）。

Liangxi (two knees) (gu-yi fan; the Yupian says: "The top of the shin"; the Shuowen says: "The bone joint at the top of the shin; the orthodox form is written as 䣛 from 卪"; 卪 is pronounced jie, and 桼 is pronounced qi; the scripture writes 膝 with 肉, which is the character in contemporary use).