Deuteronomy 10:16

Therefore, circumcise your hearts and don’t be stiff-necked any longer.

Jeremiah 4:4

Circumcise yourselves to the Lord;
remove the foreskin of your hearts,
men of Judah and residents of Jerusalem.
Otherwise, My wrath will break out like fire
and burn with no one to extinguish it
because of your evil deeds.

Deuteronomy 9:6

Understand that the Lord your God is not giving you this good land to possess because of your righteousness, for you are a stiff-necked people.

Deuteronomy 30:6

The Lord your God will circumcise your heart and the hearts of your descendants, and you will love Him with all your heart and all your soul so that you will live.

Leviticus 26:41

and I acted with hostility toward them and brought them into the land of their enemies—and if their uncircumcised hearts will be humbled, and if they will pay the penalty for their sin,

Romans 2:28-29

For a person is not a Jew who is one outwardly, and true circumcision is not something visible in the flesh.

Colossians 2:11

You were also circumcised in Him with a circumcision not done with hands, by putting off the body of flesh, in the circumcision of the Messiah.

Deuteronomy 9:13

The Lord also said to me, ‘I have seen this people, and indeed, they are a stiff-necked people.

Deuteronomy 31:27

For I know how rebellious and stiff-necked you are. If you are rebelling against the Lord now, while I am still alive, how much more will you rebel after I am dead!

Jeremiah 4:14

Wash the evil from your heart, Jerusalem,
so that you will be delivered.
How long will you harbor
malicious thoughts within you?

James 4:6-7

But He gives greater grace. Therefore He says:

God resists the proud,
but gives grace to the humble.

Treasury of Scripture Knowledge

Summary

Circumcise therefore the foreskin of your heart, and be no more stiffnecked.

Bible References

Stiff-necked

Deuteronomy 9:6
Understand that the Lord your God is not giving you this good land to possess because of your righteousness, for you are a stiff-necked people.
Deuteronomy 31:27
For I know how rebellious and stiff-necked you are. If you are rebelling against the Lord now, while I am still alive, how much more will you rebel after I am dead!
James 4:6
But He gives greater grace. Therefore He says:

God resists the proud,
but gives grace to the humble.

Holman Christian Standard Bible®, Copyright © 1999, 2000, 2002, 2003, 2009 by Holman Bible Publishers.