一切經音義 1.11

1.11

二儀（魚羈反易上繫曰易有太極是生兩儀顧野王云二儀謂天地也法象也毛詩傳云儀正也說文度也從人義聲也說文又解義字從羊從我我字從手從戈下從禾者非也羈音居宜反）。

Two forms (二儀: [儀 is pronounced with] the fanqie yu-ji [yí]. The upper 'Appended Remarks' of the Book of Changes states: 'In the Changes there is the Great Ultimate, which generates the Two Forms.' Gu Yewang says: 'The Two Forms refer to Heaven and Earth; they are models.' The Mao Commentary to the Classic of Poetry states: 'Yi means correct.' The Shuowen says: 'A measure; it derives from the person [radical] with the sound yi.' The Shuowen also explains that the character yi derives from sheep and wo; the character wo derives from hand and dagger-axe. Those written with grain beneath are incorrect. Ji has the fanqie sound ju-yi [jī]).