Deuteronomy 2:30

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.

Exodus 4:21

And the Lord said to Moses, When you go back to Egypt, see that you do before Pharaoh all the wonders which I have given you power to do: but I will make his heart hard and he will not let the people go.

Numbers 21:23

And Sihon would not let Israel go through his land; but got all his people together and went out against Israel into the waste land, as far as Jahaz, to make war on Israel.

Exodus 11:10

All these wonders Moses and Aaron did before Pharaoh: but the Lord made Pharaoh's heart hard, and he did not let the children of Israel go out of his land.

Joshua 11:19-20

Not one town made peace with the children of Israel, but only the Hivites of Gibeon: they took them all in war.

Judges 11:20

But Sihon would not give way and let Israel go through his land; and Sihon got together all his people, and put his army in position in Jahaz, and made war on Israel.

Isaiah 48:4

Because I saw that your heart was hard, and that your neck was an iron cord, and your brow brass;

Romans 9:17-23

For the holy Writings say to Pharaoh, For this same purpose did I put you on high, so that I might make my power seen in you, and that there might be knowledge of my name through all the earth.

Treasury of Scripture Knowledge

Summary

But Sihon king of Heshbon would not let us pass by him: for the LORD thy God hardened his spirit, and made his heart obstinate, that he might deliver him into thy hand, as appeareth this day.

Obstinate

Bible References

For the lord

Exodus 4:21
And the Lord said to Moses, When you go back to Egypt, see that you do before Pharaoh all the wonders which I have given you power to do: but I will make his heart hard and he will not let the people go.
Exodus 11:10
All these wonders Moses and Aaron did before Pharaoh: but the Lord made Pharaoh's heart hard, and he did not let the children of Israel go out of his land.
Numbers 21:23
And Sihon would not let Israel go through his land; but got all his people together and went out against Israel into the waste land, as far as Jahaz, to make war on Israel.
Joshua 11:19
Not one town made peace with the children of Israel, but only the Hivites of Gibeon: they took them all in war.
Judges 11:20
But Sihon would not give way and let Israel go through his land; and Sihon got together all his people, and put his army in position in Jahaz, and made war on Israel.
Romans 9:17
For the holy Writings say to Pharaoh, For this same purpose did I put you on high, so that I might make my power seen in you, and that there might be knowledge of my name through all the earth.

Obstinate

Isaiah 48:4
Because I saw that your heart was hard, and that your neck was an iron cord, and your brow brass;

General references

Exodus 7:13
But Pharaoh's heart was made hard, and he did not give ear to them, as the Lord had said.
Exodus 10:20
But the Lord made Pharaoh's heart hard, and he did not let the children of Israel go.
Deuteronomy 29:4
But even to this day the Lord has not given you a mind open to knowledge, or seeing eyes or hearing ears.
Job 39:17
For God has taken wisdom from her mind, and given her no measure of knowledge.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain