Mark 10:8

and the two shall become one flesh; so that they are no longer two, but [are united as] one flesh.

1 Corinthians 6:16

Do you not know that the one who joins himself to a prostitute is one body with her? For He says, “The two shall be one flesh.”

Genesis 2:24

For this reason a man shall leave his father and his mother, and shall be joined to his wife; and they shall become one flesh.

Ephesians 5:28

Even so husbands should and are morally obligated to love their own wives as [being in a sense] their own bodies. He who loves his own wife loves himself.

Treasury of Scripture Knowledge

Summary

And they twain shall be one flesh: so then they are no more twain, but one flesh.

General references

Bible References

One flesh

1 Corinthians 6:16
Do you not know that the one who joins himself to a prostitute is one body with her? For He says, “The two shall be one flesh.”
Ephesians 5:28
Even so husbands should and are morally obligated to love their own wives as [being in a sense] their own bodies. He who loves his own wife loves himself.

General references

Ephesians 5:31
For this reason a man shall leave his father and his mother and shall be joined [and be faithfully devoted] to his wife, and the two shall become one flesh.