'Hard' in the Bible

But Sihon, king of Heshbon, would not let us go through; for the Lord your God made his spirit hard and his heart strong, so that he might give him up into your hands as at this day.

Who was your guide through that great and cruel waste, where there were poison-snakes and scorpions and a dry land without water; who made water come out of the hard rock for you;

Keep in mind your servants, Abraham, Isaac, and Jacob, not looking at the hard heart of this people, or their evil-doing and their sin:

So I made an ark of hard wood, and had two stones cut like the others, and went up the mountain with the stones in my hands.

If in any of your towns in the land which the Lord your God is giving you, there is a poor man, one of your countrymen, do not let your heart be hard or your hand shut to him;

Let it not seem hard to you that you have to send him away free; for he has been working for you for six years, which is twice the regular time for a servant: and the blessing of the Lord your God will be on you in everything you do.

Let him go on living among you in whatever place is most pleasing to him: do not be hard on him.

Do not be hard on a servant who is poor and in need, if he is one of your countrymen or a man from another nation living with you in your land.

And the Egyptians were cruel to us, crushing us under a hard yoke:

And the heaven over your heads will be brass, and the earth under you hard as iron.

A hard-faced nation, who will have no respect for the old or mercy for the young:

That man among you who is soft and used to comfort will be hard and cruel to his brother, and to his dear wife, and to of those his children who are still living;

For I have knowledge of your hard and uncontrolled hearts: even now, while I am still living, you will not be ruled by the Lord; how much less after my death?

He put him on the high places of the earth, his food was the increase of the field; honey he gave him out of the rock and oil out of the hard rock;