1 Corinthians 6:17

but he that is connected with the Lord is one spirit with him.

John 17:21-23

that they all may be one; as thou, Father, art in me and I in thee, that they also may be in us, that the world may believe that thou didst send me.

John 3:6

That which is born of the flesh, is flesh; and that which is born of the Spirit, is spirit.

1 Corinthians 12:13

For by one Spirit we were all baptized into one body, whether Jews or Greeks, whether slaves or freemen; and were all made to drink one Spirit.

Galatians 2:20

I have been crucified with Christ, and no longer do I live, but Christ liveth in me; and the life which I now live in the flesh I live in faith in the Son of God, who loved me, and gave himself for me.

Ephesians 4:3-4

endeavoring to keep the unity of the Spirit in the bond of peace.

Ephesians 5:30

for we are members of his body, of his flesh, and of his bones.

Philippians 2:5

Yea, let this mind be in you which was in Christ Jesus,

Treasury of Scripture Knowledge

Summary

But he that is joined unto the Lord is one spirit.

Bible References

General references

1 Corinthians 12:13
For by one Spirit we were all baptized into one body, whether Jews or Greeks, whether slaves or freemen; and were all made to drink one Spirit.
John 3:6
That which is born of the flesh, is flesh; and that which is born of the Spirit, is spirit.
John 17:21
that they all may be one; as thou, Father, art in me and I in thee, that they also may be in us, that the world may believe that thou didst send me.
Ephesians 4:3
endeavoring to keep the unity of the Spirit in the bond of peace.
Ephesians 5:30
for we are members of his body, of his flesh, and of his bones.
Philippians 2:5
Yea, let this mind be in you which was in Christ Jesus,