法苑珠林 99.39

99.39

又四分律云。不嚼楊枝有五過失。一口氣臭。二不善別味。三熱癊病不消。四不引食。五眼不明。

The Dharmaguptaka-vinaya also says: "Not chewing a willow twig has five faults: first, the breath smells foul; second, one cannot distinguish tastes well; third, illnesses of heat and phlegm do not disperse; fourth, it does not stimulate appetite; and fifth, the eyes are not clear."