續一切經音義 10.72

10.72

寰中（上戶關反說文云寰宇也字書以四海為寰中也今傳文云非夫契彼寰中孰能為茲高論也作此鐶字恐非此用）。

寰中 (The first character has the fanqie 戶關 [hù + guān]. The Shuowen jiezi states: 'The imperial domain.' The Zishu considers the four seas to be the realm [寰中]. Now the transmitted text states: 'Were it not for one who accords with that realm, who could produce such lofty discourse?' Writing it with this character 鐶 [ring] is likely not appropriate for this usage).