Mark 10:8

so that they are no more two, but one flesh.

1 Corinthians 6:16

Do you not know that he who joins himself to a harlot is one with her in body? (For God says, The two shall become one flesh.)

Ephesians 5:28

That is how husbands ought to love their wives, as they love their own bodies. He who loves his 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 he who joins himself to a harlot is one with her in body? (For God says, The two shall become one flesh.)
Ephesians 5:28
That is how husbands ought to love their wives, as they love their own bodies. He who loves his wife loves himself.

General references

Ephesians 5:31
For this cause shall a man leave his father and his mother, and shall cleave unto his wife, and they two shall be one flesh.