嘢可以亂食，說話唔可以亂講 (je5 ho2 ji5 lyun6 sik6, syut3 waa6 m4 ho2 ji5 lyun6 gong2) — one must watch what comes out of their mouth (what they say) more so than what they put into their mouth (what they eat) [colloquial] in Cantonese
jeˏ₅嘢hoˊ²可jiˏ₅以lyunˍ₆亂sik6,食，syut˗₃說waaˍ₆話mˎ₄唔hoˊ²可jiˏ₅以lyunˍ₆亂gongˊ²講简 嘢可以乱食，说话唔可以乱讲
Mandarin Pinyin: ye3 ke3yi3 luan4 shi2, shuo1hua4 wu2 ke3 yi3 luan4jiang3
Meaning of 嘢可以亂食，說話唔可以亂講
nounone must watch what comes out of their mouth (what they say) more so than what they put into their mouth (what they eat) [colloquial]