三思而後行

三思而后行
sānsīérhòuxíng
think again and again before acting (idiom); consider carefully in advance

CEDICT

look before you leap

Wiktionary

Entry Composition

1 三思 sānsī to think carefully (before taking action); to think twice; to contemplate
2 而後 érhòu
  1. after that
  2. then
3 行 xíng
  1. (bound form) to walk; to go; to travel
  2. (literary) trip; journey; visit
  3. (bound form) temporary; makeshift
  4. (bound form) current; in circulation
  5. (bound form) to do; to perform
  6. capable; competent
  7. all right; OK!; will do
  8. behavior; conduct (Taiwan pr. xìng)
  9. (literary) about to; soon