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.