Acts 7:51
"You people, stubborn in will, heathenish in hearts and ears, you are always resisting the Holy Spirit, as your forefathers did, too.
Romans 2:5
But in your stubbornness and impenitence of heart you are storing up wrath for yourself on the day of wrath, when the justice of God's judgments will be uncovered.
Hebrews 3:13
but day by day, as long as "Today" shall last, continue to encourage one another, so that not one of you may be hardened by sin's deceiving ways,
Hebrews 3:15
and yet the warning continues to be spoken: "If you but hear His voice, you must not harden your hearts as they did in provoking me."