一切經音義 65.16

65.16

圭合（古携反漢書多少者不失圭撮四圭曰撮孟康曰六十四黍為一圭也）。

圭合 (grains and pecks: [the upper character is pronounced] 古 + 携 [guī]. The Hanshu says: "Quantities large or small do not deviate by a guī or a cuò; four guī make one cuò." Meng Kang says: "Sixty-four millet grains make one guī").