Cross reference
Mark 10:7
7 For this cause shall a man leave his father and mother, and shall cleave to his wife;
Genesis 2:24
24 Therefore shall a man leave his father and his mother, and shall cleave unto his wife: and they shall be one flesh.
Ephesians 5:31
31 For this cause shall a man leave his father and mother, and shall cleave to his wife; and the two shall become one flesh.
Matthew 19:5-6
5 and said, For this cause shall a man leave his father and mother, and shall cleave to his wife; and the two shall become one flesh?
6 So that they are no more two, but one flesh. What therefore God hath joined together, let not man put asunder.