不是一家人不進一家門 [－－－－－－进－－门]

Jyutping bat1 si6 jat1 gaa1 jan4 bat1 zeon3 jat1 gaa1 mun4
Pinyin bù shì yī jiā rén bù jìn yī jiā mén

Definitions (CC-CEDICT)
  1. people who don't belong together, don't get to live together (idiom)
  2. marriages are predestined
  3. people marry because they share common traits