續一切經音義 2.103

2.103

頤頷（上以伊反下含感反方言云頤頷牙名也文字集略云頦也說文云輔車骨也從頁頁頭也臣含聲也經文作頤非也臣音夷也）。

Cheeks and chin (頤頷: the first character has the fanqie 以 + 伊; the second has the fanqie 含 + 感. Fangyan says, “Yí and hàn are names for the jaw.” Wenzi jilüe says, “The lower jaw.” Shuowen says, “The cheekbone; it takes 頁 [meaning head] with 含 abbreviated for phonetic.” In the sūtras it is written 頤, which is incorrect; 臣 is pronounced 夷).