bìng​cóng​kǒu​rù​huò​cóng​kǒu​chū

illness enters by the mouth, trouble comes out by the mouth

病从口入,祸从口出 病從口入,禍從口出 bìng​cóng​kǒu​rù​huò​cóng​kǒu​chū
illness enters by the mouth, trouble comes out by the mouth
(idiom) Illness is often caused by what one eats, and trouble is often caused by what one says; reminds people to be careful with their diet and their speech.