Philippians 3:3
3 But we are those who are truly God's people. And it is not because someone has circumcised us. It is God's own Spirit that leads us to worship God. We thank God because of what Christ Jesus has done for us. We know that it is not human ideas that can save us.
3:3Some Jewish teachers were saying that Christians had to be circumcised to belong to God's people. Paul is telling the Christians that they must not believe these ideas.