Hebrews 3:8

if ye will hear his voice, harden not your hearts, as in the provocation, in the day of temptation in the wilderness,

Matthew 13:15

For the heart of this people is waxed fat, and their ears are dull of hearing, and their eyes have they closed: lest at any time they should see with their eyes and hear with their ears, and understand with their hearts, and should be converted and I should heal them.

Acts 19:9

But when some were hardened, and would not believe, but spake reproachfully of the way before the multitude, he departed from them, and separated the disciples, discoursing daily in the school of one Tyrannus.

Romans 2:5-6

But after thy hardness and impenitent heart treasurest up to thyself wrath in the day of wrath, and revelation, and righteous judgment of God?

1 Corinthians 10:9

Neither let us tempt Christ, as some of them also tempted, and were destroyed by serpents.

Hebrews 3:12-13

Take heed, brethren, left there be in any of you an evil heart of unbelief, in departing from the living God:

Treasury of Scripture Knowledge

Summary

Hebrews 3:8

Harden not your hearts, as in the provocation, in the day of temptation in the wilderness:

Harden

Of

1 Corinthians 10:9

General references

Luke 8:6

Bible References

Harden

Take heed, brethren, left there be in any of you an evil heart of unbelief, in departing from the living God:

But after thy hardness and impenitent heart treasurest up to thyself wrath in the day of wrath, and revelation, and righteous judgment of God?

Of

Neither let us tempt Christ, as some of them also tempted, and were destroyed by serpents.

General references

And some fell upon a rock, and springing up, it withered away, because it lacked moisture.