借贼兵，赍盗粮
jiè​zéi​bīng​jī​dào​liáng

to arm the enemy and feed the robber

  1. 借 jiè verb
    to lend
    to lend something to someone; often used in combination with 给 gěi or 出 chū
  2. 贼 賊 zéi noun
    thief
    thief; robber; person who steals
  3. 兵 bīng noun
    weapons
    (bound form) weapons; arms
  4. ， jī
    non-Chinese
  5. 赍盗粮 齎盜糧 jī​dào​liáng
    to provide the enemy with food
    (idiom) to give grain to bandits; to provide the enemy with resources, especially unintentionally, and thus become their unwitting tool. Often used in the phrase 借贼兵，赍盗粮 jiè​zéi​bīng​jī​dào​liáng