Cross reference
Exodus 9:12
12 And Jehovah hardened the heart of Pharaoh, and he hearkened not unto them, as Jehovah had spoken unto Moses.
Exodus 4:21
21 And Jehovah said unto Moses, When thou goest back into Egypt, see that thou do before Pharaoh all the wonders which I have put in thy hand: but I will harden his heart and he will not let the people go.
Exodus 7:13-14
13 And Pharaoh's heart was hardened, and he hearkened not unto them; as Jehovah had spoken.
14 And Jehovah said unto Moses, Pharaoh's heart is stubborn, he refuseth to let the people go.
Psalms 81:11-12
11 But my people hearkened not to my voice; And Israel would none of me.
12 So I let them go after the stubbornness of their heart, That they might walk in their own counsels.
Revelation 16:10-11
10 And the fifth poured out his bowl upon the throne of the beast; and his kingdom was darkened; and they gnawed their tongues for pain,
11 and they blasphemed the God of heaven because of their pains and their sores; and they repented not of their works.