折疑論 2.145

2.145

如數罟不入於污池。斧斤以時入山林（孟子。數音促𮊁音古。污污音烏。數密也𮊁網也。古者網𮊁必用四寸之目。魚不滿尺。市不得鬻。草木零落。然後斧斤方許入山林）。

As in: 'Close-meshed nets do not enter the deep pools, and axes enter the mountain forests according to season' (Mencius: shu is pronounced cu; gu is net; wu is pronounced wu. Shu means close-meshed; gu means net. In ancient times, nets had to have meshes of four inches; fish not reaching a foot in length could not be sold in markets; only after grasses and trees shed their leaves were axes allowed to enter mountain forests).