don't let your tongue decapitate you

an Arabic proverb meaning

a) don't say something hurtful to someone when you are in a close relationship with them and you want that relationship to continue"

b) think twice before saying something retargerous and having subsequently deal with the negative consequences

just like don't put the camel in the trash , don't let your tongue decapitate you is a useful phrase to add to your trashabulary if you are a modern idiotager yet want to be grounded in reality