'Circumcise' in the Bible

So circumcise your heart, and stiffen your neck no longer.

“Moreover 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, so that you may live.

At that time the Lord said to Joshua, “Make for yourself flint knives and circumcise again the sons of Israel the second time.”

“Circumcise yourselves to the LordAnd remove the foreskins of your heart,Men of Judah and inhabitants of Jerusalem,Or else My wrath will go forth like fireAnd burn with none to quench it,Because of the evil of your deeds.”