'Hard hearted' in the Bible
If a man has a son who is hard-hearted and uncontrolled, who gives no attention to the voice of his father and mother, and will not be ruled by them, though they give him punishment:
And say to them, This son of ours is hard-hearted and uncontrolled, he will not give attention to us; he gives himself up to pleasure and strong drink.
The most soft and delicate of your women, who would not so much as put her foot on the earth, so delicate is she, will be hard-hearted to her husband and to her son and to her daughter;
They have become false, they are not his children, the mark of sin is on them; they are an evil and hard-hearted generation.
But whenever the judge was dead, they went back and did more evil than their fathers, going after other gods, to be their servants and their worshippers; giving up nothing of their sins and their hard-hearted ways.
Now do not be hard-hearted, as your fathers were; but give yourselves to the Lord, and come into his holy place, which he has made his for ever, and be the servants of the Lord your God, so that the heat of his wrath may be turned away from you.
But they were hard-hearted, and went against your authority, turning their backs on your law, and putting to death your prophets, who gave witness against them with the purpose of turning them back again to you, and they did much to make you angry.
Truly, God gives up the hard-hearted, and will not give life to the sinner.