Hebrews 3:8

Harden not your hearts, as when Israel provoked me on the day when they tried my patience in the desert,

Hebrews 3:15

To use the words of Scripture-- 'If to-day you hear God's voice, harden not your hearts, as when Israel provoked me.'

Revelation 16:9

and men were scorched by the intense heat. They blasphemed the Name of God who controlled these Curses, yet they did not repent and give him praise.

Treasury of Scripture Knowledge

Summary

But when Pharaoh saw that there was respite, he hardened his heart, and hearkened not unto them; as the LORD had said.

Bible References

He hardened

Hebrews 3:8
Harden not your hearts, as when Israel provoked me on the day when they tried my patience in the desert,
Revelation 16:9
and men were scorched by the intense heat. They blasphemed the Name of God who controlled these Curses, yet they did not repent and give him praise.