殺ㄕㄚshā彘ㄓˋzhì教ㄐㄧㄠˋjiào子ㄗˇzǐ

曾子之妻與子戲言殺豬，而曾子以為不應欺騙孩子，故殺豬教子。典出《韓非子·外儲說左上》。後用以指父母教導子女應言行一致。

英to kill a pig as a lesson to the children (idiom); parents must teach by example