1 Corinthians 6:17

1 Corinthians 12:13 NIV
For we were all baptized by one Spirit so as to form one body—whether Jews or Gentiles, slave or free —and we were all given the one Spirit to drink.

Ephesians 4:3-4 NIV
Make every effort to keep the unity of the Spirit through the bond of peace. There is one body and one Spirit, just as you were called to one hope when you were called ;

Galatians 2:20 NIV
I have been crucified with Christ and I no longer live, but Christ lives in me. The life I now live in the body, I live by faith in the Son of God, who loved me and gave himself for me.

John 17:21-23 NIV
that all of them may be one, Father, just as you are in me and I am in you. May they also be in us so that the world may believe that you have sent me. I have given them the glory that you gave me, that they may be one as we are one — I in them and you in me—so that they may be brought to complete unity. Then the world will know that you sent me and have loved them even as you have loved me.

John 3:6 NIV
Flesh gives birth to flesh, but the Spirit gives birth to spirit.