勿谓言之不预
wù​wèi​yán​zhī​bù​yù

don't say you weren't warned

  1. 勿 wù adverbverb
    do not
    Used in formal or written contexts to express prohibition or advice, similar to 不要 bù​yào or 别 bié.
  2. 谓 謂 wèi adjectiveverb
    to say
    (literary or bound form) to say; to speak; to state; to inform or tell someone; often appears in fixed phrases such as 所谓 suǒ​wèi or 可谓 kě​wèi
  3. 言之不预 言之不預 yán​zhī​bù​yù
    to not forewarn
    to fail to explain or give warning in advance