12 occurrences across the corpus

King James Version

Job 38:38

When the dust groweth into hardness, and the clods cleave fast together?

Matthew 19:8

He saith unto them, Moses because of the hardness of your hearts suffered you to put away your wives: but from the beginning it was not so.

Mark 3:5

And when he had looked round about on them with anger, being grieved for the hardness of their hearts, he saith unto the man, Stretch forth thine hand. And he stretched it out: and his hand was restored whole as the other.

Mark 10:5

And Jesus answered and said unto them, For the hardness of your heart he wrote you this precept.

Mark 16:14

Afterward he appeared unto the eleven as they sat at meat, and upbraided them with their unbelief and hardness of heart, because they believed not them which had seen him after he was risen.

Romans 2:5

But after thy hardness and impenitent heart treasurest up unto thyself wrath against the day of wrath and revelation of the righteous judgment of God;

2 Timothy 2:3

Thou therefore endure hardness, as a good soldier of Jesus Christ.

KJV Apocrypha (Catholic Deuterocanon)

Sirach (Ecclesiasticus) 16:10

Nor the six hundred thousand footmen, who were gathered together in the hardness of their hearts.

Apostolic Fathers

Shepherd of Hermas: Visions 3:7

Now the other stones which you saw cast far away from the tower, and falling upon the public road and rolling from it into pathless places, are those who have indeed believed, but through doubt have abandoned the true road. Thinking, then, that they could find a better, they wander and become wretched, and enter upon pathless places. But those which fell into the fire and were burned, are those who have departed for ever from the living God; nor does the thought of repentance ever come into their hearts, on account of their devotion to their lusts and to the crimes which they committed. Do you wish to know who are the others which fell near the waters, but could not be rolled into them? These are they who have heard the word, and wish to be baptized in the name of the Lord; but when the chastity demanded by the truth comes into their recollection, they draw back, and again walk after their own wicked desires.” She finished her exposition of the tower. But I, shameless as I yet was, asked her, “Is repentance possible for all those stones which have been cast away and did not fit into the building of the tower, and will they yet have a place in this tower?” “Repentance,” said she, “is yet possible, but in this tower they cannot find a suitable place. But in another and much inferior place they will be laid, and that, too, only when they have been tortured and completed the days of their sins. And on this account will they be transferred, because they have partaken of the righteous Word. And then only will they be removed from their punishments when the thought of repenting of the evil deeds which they have done has come into their hearts. But if it does not come into their hearts, they will not be saved, on account of the hardness of their heart.”

Shepherd of Hermas: Mandates 5:2

Hear now,” said he, “how wicked is the action of anger, and in what way it overthrows the servants of God by its action, and turns them from righteousness. But it does not turn away those who are full of faith, nor does it act on them, for the power of the Lord is with them. It is the thoughtless and doubting that it turns away. For as soon as it sees such men standing stedfast, it throws itself into their hearts, and for nothing at all the man or woman becomes embittered on account of occurrences in their daily life, as for instance on account of their food, or some superfluous word that has been uttered, or on account of some friend, or some gift or debt, or some such senseless affair. For all these things are foolish and empty and unprofitable to the servants of God. But patience is great, and mighty, and strong, and calm in the midst of great enlargement, joyful, rejoicing, free from care, glorifying God at all times, having no bitterness in her, and abiding continually meek and quiet. Now this patience dwells with those who have complete faith. But anger is foolish, and fickle, and senseless. Now, of folly is begotten bitterness, and of bitterness anger, and of anger frenzy. This frenzy, the product of so many evils, ends in great and incurable sin. For when all these spirits dwell in one vessel in which the Holy Spirit also dwells, the vessel cannot contain them, but overflows. The tender Spirit, then, not being accustomed to dwell with the wicked spirit, nor with hardness, withdraws from such a man, and seeks to dwell with meekness and peacefulness. Then, when he withdraws from the man in whom he dwelt, the man is emptied of the righteous Spirit; and being henceforward filled with evil spirits, he is in a state of anarchy in every action, being dragged hither and thither by the evil spirits, and there is a complete darkness in his mind as to everything good. This, then, is what happens to all the angry. Wherefore do you depart from that most wicked spirit anger, and put on patience, and resist anger and bitterness, and you will be found in company with the purity which is loved by the Lord. Take care, then, that you neglect not by any chance this commandment: for if you obey this commandment, you will be able to keep all the other commandments which I am to give you. Be strong, then, in these commandments, and put on power, and let all put on power, as many as wish to walk in them.”

1 Enoch

1 Enoch 16:4

And this you have related to women in the hardness of your heart, and by that mystery have women and mankind multiplied evils upon the earth.

OT Pseudepigrapha

4 Maccabees 4:15

For who is there that being a philosopher following righteously the whole rule of philosophy, and having put his trust in God, and knowing that it is a blessed thing to endure all hardness for the sake of virtue, would not conquer his passions for the sake of righteousness?