'Hardness' in the Bible

He saith unto them, Moses for your hardness of heart suffered you to put away your wives: but from the beginning it hath not been so.

But Jesus said unto them, For your hardness of heart he wrote you this commandment.

And afterward he was manifested unto the eleven themselves as they sat at meat; and he upbraided them with their unbelief and hardness of heart, because they believed not them that had seen him after he was risen.

but after thy hardness and impenitent heart treasurest up for thyself wrath in the day of wrath and revelation of the righteous judgment of God;