'Hardening' in the Bible

And when he had looked round about on them with anger, being grieved at the hardening of their heart, he saith unto the man, Stretch forth thy hand. And he stretched it forth; and his hand was restored.

For I would not, brethren, have you ignorant of this mystery, lest ye be wise in your own conceits, that a hardening in part hath befallen Israel, until the fulness of the Gentiles be come in;

being darkened in their understanding, alienated from the life of God, because of the ignorance that is in them, because of the hardening of their heart;