Galatians 6:11-13

See what large letters I use as I write to you in my own hand! Those who want to impress people by means of the flesh are trying to compel you to be circumcised. The only reason they do this is to avoid being persecuted for the cross of Christ. Not even those who are circumcised keep the law, yet they want you to be circumcised that they may boast about your circumcision in the flesh. 

See what large letters I use as I write to you in my own hand! 
1 Corinthians 16:21  I, Paul, write this greeting in my own hand.

Those who want to impress people by means of the flesh are trying to compel you to be circumcised
Matthew 23:25-26  "Woe to you, teachers of the law and Pharisees, you hypocrites! You clean the outside of the cup and dish, but inside they are full of greed and self-indulgence. Blind Pharisee! First clean the inside of the cup and dish, and then the outside also will be clean."
Acts 15:1  Certain people came down from Judea to Antioch and were teaching the believers: "Unless you are circumcised, according to the custom taught by Moses, you cannot be saved."

The only reason they do this is to avoid being persecuted for the cross of Christ 
Galatians 5:11  Brothers and sisters, if I am still preaching circumcision, why am I still being persecuted? In that case the offense of the cross has been abolished.

Not even those who are circumcised keep the law 
Romans 2:25  Circumcision has value if you observe the law, but if you break the law, you have become as though you had not been circumcised.

yet they want you to be circumcised that they may boast about your circumcision in the flesh 
Philippians 3:2-3  Watch out for those dogs, those evildoers, those mutilators of the flesh. For it is we who are the circumcision, we who serve God by his Spirit, who boast in Christ Jesus, and who put no confidence in the flesh--...

Scriptures taken from the Holy Bible, New International Version® NIV®, Copyright© 1973, 1978, 1984, 2011 by Biblica, Inc.® Used by permission. All rights reserved worldwide. 
Limited to 15 verses per post.