翻譯名義集 3.251

3.251

【一肘】人一尺八寸，佛三尺六寸。言一圍者，《莊子音》云：「徑尺曰圍。」言一仞者，《說文》云：「仞謂申臂一尋也。」《史記》并鄭玄，皆云七尺曰仞。《小雅》：「四尺謂之仞，倍謂之尋，尋舒兩肱。」或曰：五尺曰尋，倍尋曰常。

[One cubit (hasta)]: For an ordinary human, it is one chi and eight cun; for the Buddha, it is three chi and six cun. Regarding 'one encircle (wei)': the Zhuangzi yin says, 'A diameter of one chi is called a wei.' Regarding 'one fathom (ren)': the Shuowen says, 'A ren means the stretch of both arms, which is one xun.' The Shiji together with Zheng Xuan both state that seven chi is called a ren. The 'Xiaoya' states: 'Four chi is called a ren; double that is called a xun. A xun is the extension of both arms.' Some say: five chi is called a xun, and double a xun is called a chang.