admonition
noun [ C ] formal uk/ˌæd.məˈnɪʃ.ən/ us/ˌæd.məˈnɪʃ.ən/ (also admonishment, uk/ədˈmɒn.ɪʃmənt/ us/-ˈmɑː.nɪʃ-/)
劝诫;忠告;警告;责备
a piece of advice that is also a warning to someone about their behaviour
The most common parental admonition must surely be "Don't stay out late". 父母告诫孩子们最多的话肯定是“别在外面呆到太晚”。