續一切經音義 7.6

7.6

迺辟（上奴改反切韻語辭也爾雅曰仍迺郭璞注云迺即乃也釋文云古乃字也下必益反命也考聲召也切韻除也）。

迺辟 (The upper character is 奴 + 改 [nǎi]; the Qieyun says it is an introductory particle; the Erya says: "Réng means nǎi"; Guo Pu's commentary says: "Nǎi is simply 乃"; the Shiwen says it is the ancient character for 乃. The lower character is 必 + 益 [bì]; it means "to command"; the Kaosheng says it means "to summon"; the Qieyun says it means "to remove").