'Stiff necked' in the Bible

Understand therefore, that the LORD thy God giveth thee not this good land to possess it for thy righteousness; for thou art a stiff-necked people.

Furthermore, the LORD spoke to me, saying, I have seen this people, and behold, it is a stiff-necked people:

Circumcise therefore the foreskin of your heart, and be no more stiff-necked.