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 (Wiktionary)
  1. proverb
    If a bride were not meant to marry into a family, fate would not bring her in the door.