Cross reference
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."
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.
Matthew 19:5
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?'
Mark 10:7-8
7 For this cause a man will leave his father and mother, and will join to his wife,
8 and the two will become one flesh,' so that they are no longer two, but one flesh.
1 Corinthians 6:16
16 Or don't you know that he who is joined to a prostitute is one body? For, "The two," says he, "will become one flesh."