• Deuteronomy 10:16
  Therefore circumcise the foreskin of your heart, and be stiff-necked no longer.
   
• Acts 7:51
  'You stiff-necked and uncircumcised in heart and ears! You always resist the Holy Spirit; as your fathers did, so do you.
   

Related Scriptures

• Deuteronomy 30:6
  And the LORD your God will circumcise your heart and the heart of your descendants, to love the LORD your God with all your heart and with all your soul, that you may live.