諸經要集 20.80

20.80

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。

Furthermore, the Dharmaguptaka-vinaya states: Not chewing tooth-sticks has five faults: first, the breath is foul; second, one cannot distinguish tastes well; third, illnesses of heat and phlegm are not dispelled; fourth, it does not induce appetite; fifth, the eyes are not clear.