Cross reference
Mark 10:7
7 For this cause a man will leave his father and mother, and will join to his wife,
Genesis 2:24
24 Therefore a man will leave his father and his mother, and will join with his wife, and they will be one flesh.
Ephesians 5:31
31 "For this cause a man will leave his father and mother, and will be joined to his wife. The two will become one flesh."
Matthew 19:5-6
5 and said, 'For this cause a man shall leave his father and mother, and shall join to his wife; and the two shall become one flesh?'
6 So that they are no more two, but one flesh. What therefore God has joined together, don't let man tear apart."