Deuteronomy 2:30
But Sihon, king of Heshbon, would not let us pass by him, for the LORD thy God had hardened his spirit and made his heart obstinate that he might deliver him into thy hand as until this day.
Exodus 4:21
And the LORD said unto Moses, When thou goest to return into Egypt, see that thou do all those wonders before Pharaoh, which I have put in thine hand; but I will harden his heart, that he shall not let the people go.
Numbers 21:23
But Sihon would not allow Israel to pass through his border; instead Sihon gathered all his people together and went out against Israel into the wilderness; and he came to Jahaz and fought against Israel.
Exodus 11:10
And Moses and Aaron did all these wonders before Pharaoh: but the LORD had hardened Pharaoh's heart, so that he would not let the sons of Israel go out of his land.
Joshua 11:19-20
There was not a city that made peace with the sons of Israel except the Hivites, the inhabitants of Gibeon; they took all the others in battle.
Judges 11:20
But Sihon did not trust Israel to pass through his border; but Sihon gathered all his people together and pitched camp in Jahaz and fought against Israel.
Isaiah 48:4
Because I know that thou art obstinate, and thy neck is an iron sinew, and thy brow bronze;
Romans 9:17-23
For the scripture saith of Pharaoh, Even for this same purpose have I raised thee up, that I might show my power in thee and that my name might be declared throughout all the earth.