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 3:8-9
You must not harden your hearts as they did in provoking me, as on the day in the desert they tested me,
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 3:15-19
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."
Hebrews 12:25
See to it that you do not refuse to listen to Him who is speaking to you. For if they did not escape, because they refused to listen to him who warned them here on earth, how much less can we, if we reject Him who is from heaven?
Jude 1:5
Now I want to remind you, though you know it all already, that although the Lord had saved a people out of the land of Egypt, He afterward destroyed those who did not believe.
Acts 19:9
But as some of them grew harder and harder and refused to believe, actually criticizing The Way before the people, he left them, withdrew his disciples, and continued his discussions in the lecture-hall of Tyrannus.