Romans 2:28

For he is not a Jew, who is one outwardly, nor is that circumcision, which is outward, in the flesh;

Galatians 6:15

For neither is circumcision anything, nor uncircumcision, but a new creation.

Matthew 3:9

and think not to say within yourselves, We have Abraham for our father; for I say to you, that God is able out of these stones to raise up children to Abraham.

Romans 9:6-8

Not as though the word of God hath failed; for not all they that are of Israel are Israel;

Revelation 2:9

I know thy affliction and poverty, (but thou art rich,) and the blasphemy of those who say they are Jews, and are not, but are a synagogue of Satan.

John 1:47

Jesus saw Nathanael coming to him, and saith of him, Behold an Israelite indeed, in whom is no guile.

John 8:37-39

I know that ye are Abrahams offspring; but ye seek to kill me, because my word is not received within you.

Romans 2:17

But if thou art called a Jew, and restest on the Law, and makest thy boast of God,

Romans 4:10-12

How then was it so accounted? After his circumcision, or while he was uncircumcised? Not after he was circumcised, but while he was uncircumcised.

1 Peter 3:21

which in its antitype, baptism, is now saving you,not the putting away of the filth of the flesh, but the earnest seeking for a good conscience toward God,by the resurrection of Jesus Christ;

Treasury of Scripture Knowledge

Summary

For he is not a Jew, which is one outwardly; neither is that circumcision, which is outward in the flesh:

Bible References

For he

Romans 9:6
Not as though the word of God hath failed; for not all they that are of Israel are Israel;
Matthew 3:9
and think not to say within yourselves, We have Abraham for our father; for I say to you, that God is able out of these stones to raise up children to Abraham.
John 1:47
Jesus saw Nathanael coming to him, and saith of him, Behold an Israelite indeed, in whom is no guile.
John 8:37
I know that ye are Abrahams offspring; but ye seek to kill me, because my word is not received within you.
Galatians 6:15
For neither is circumcision anything, nor uncircumcision, but a new creation.
Revelation 2:9
I know thy affliction and poverty, (but thou art rich,) and the blasphemy of those who say they are Jews, and are not, but are a synagogue of Satan.

Neither

Romans 4:10
How then was it so accounted? After his circumcision, or while he was uncircumcised? Not after he was circumcised, but while he was uncircumcised.
1 Peter 3:21
which in its antitype, baptism, is now saving you,not the putting away of the filth of the flesh, but the earnest seeking for a good conscience toward God,by the resurrection of Jesus Christ;