折疑論 4.53

4.53

然以蒲牢含響。為長鯨扣之。則莫得悶其聲也（海有大魚名鯨。海島有獸名蒲牢。蒲牢畏鯨。鯨一躍蒲牢輒大鳴吼。故鐘上鑄蒲牢之形。擊鐘之木。以為鯨魚之形。故問者如鯨。答者如蒲牢之應聲也）。

Yet, when the pulao holds its resonance and the great whale strikes it, its sound cannot be muffled (in the sea there is a great fish named whale; on the sea islands there is a beast named pulao. The pulao fears the whale; whenever the whale leaps, the pulao lets out a great roar. Therefore the shape of a pulao is cast on bells, and the wood used to strike the bell is shaped like a whale. Thus the questioner is like the whale, and the respondent is like the responding sound of the pulao).