来而不往非礼也
lái'ér​bù​wǎng​fēi​lǐ​yě

one should return as good as one receives

  1. 来 來 lái verb
    to come
    To come; to arrive; to move toward the speaker; to crop up or happen
  2. 而 ér conjunction
    but
    Used to connect ideas that contrast or conflict; yet; but; on the other hand
  3. 不 bù adverb
    not
    Negative adverb used before verbs, adjectives, and other adverbs to indicate negation; also used as a bound-form prefix to form terms with opposite meanings
  4. 往 wǎng verb
    to go
    to go to a place; to head in a direction; to travel toward a destination
  5. 非礼 非禮 fēi​lǐ
    impolite
    Not conforming to etiquette or protocol; rude; discourteous; contrary to social norms
  6. 也 yě adjective
    [classical particle]
    (literary) particle used at the end of a sentence to indicate a judgment, explanation, or to strengthen an affirmative or interrogative mood; or used mid-sentence after a word or phrase to indicate a pause or emphasize the topic