Romans 2:28

For not he who is outwardly such, is the Jew; neither is that which is outward in the flesh, circumcision.

Galatians 6:15

For in Christ Jesus neither circumcision availeth any thing, nor uncircumcision, but a new creation.

Matthew 3:9

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

Romans 9:6-8

Now it is not supposable that the word of God hath failed. For these are not all Israel, who are of Israel:

Revelation 2:9

I know thy works, and thy tribulation, and thy poverty (though thou art rich), and the calumnies of those who say they are Jews, yet are not, but are Satan's synagogue.

John 1:47

Jesus saw Nathaniel coming to him, and saith of him, Behold an Israelite in reality, in whom there is no guile!

John 8:37-39

I know that ye are Abraham's seed; yet ye seek to kill me, because my word has no place in you.

Romans 2:17

Lo! thou art named a Jew, and restest on the law, and boastest in God,

Romans 4:10-12

How then was it imputed to him? when circumcised, or while uncircumcised? Not when circumcised, but whilst uncircumcised.

1 Peter 3:21

The antitype to which baptism now saveth us (not the mere removal of filth from the flesh, but the engagement of a good conscience to 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
Now it is not supposable that the word of God hath failed. For these are not all Israel, who are of Israel:
Matthew 3:9
and think not to say in yourselves, We have Abraham for our father: for I say unto you, that God is able out of these stones to raise up children to Abraham.
John 1:47
Jesus saw Nathaniel coming to him, and saith of him, Behold an Israelite in reality, in whom there is no guile!
John 8:37
I know that ye are Abraham's seed; yet ye seek to kill me, because my word has no place in you.
Galatians 6:15
For in Christ Jesus neither circumcision availeth any thing, nor uncircumcision, but a new creation.
Revelation 2:9
I know thy works, and thy tribulation, and thy poverty (though thou art rich), and the calumnies of those who say they are Jews, yet are not, but are Satan's synagogue.

Neither

Romans 4:10
How then was it imputed to him? when circumcised, or while uncircumcised? Not when circumcised, but whilst uncircumcised.
1 Peter 3:21
The antitype to which baptism now saveth us (not the mere removal of filth from the flesh, but the engagement of a good conscience to God), by the resurrection of Jesus Christ: