Hebrews 3:7-13 Therefore, as the Holy Spirit says: “ Today, if you will hear His voice, Do not harden your hearts as in the rebellion, In the day of trial in the wilderness, Where your fathers tested Me, tried Me, And saw My works forty years. Therefore I was angry with that generation, And said, ‘They always go astray intheirheart, And they have not known My ways.’ So I swore in My wrath, 'They shall not enter My rest.'" Beware, brethren, lest there be in any of you an evil heart of unbelief in departing from the living God; but exhort one another daily, while it is called "Today," lest any of you be hardened through the deceitfulness of sin.
Psalm 95:7-10 For He is our God, And we are the people of His pasture, And the sheep of His hand. Today, if you will hear His voice: “Do not harden your hearts, as in the rebellion, As in the day of trial in the wilderness, When your fathers tested Me; They tried Me, though they saw My work. For forty years I was grieved with that generation, And said, ‘It is a people who go astray in their hearts, And they do not know My ways.’
Hebrews 3:15 while it is said: "Today, if you will hear His voice, Do not harden your hearts as in the rebellion."
Hebrews 4:2 For indeed the gospel was preached to us as well as to them; but the word which they heard did not profit them, not being mixed with faith in those who heard it.
Mark 6:52 For they had not understood about the loaves, because their heart was hardened.
Mark 16:14 Later He appeared to the eleven as they sat at the table; and He rebuked their unbelief and hardness of heart, because they did not believe those who had seen Him after He had risen.
Luke 8:15 But the ones that fell on the good ground are those who, having heard the word with a noble and good heart, keep it and bear fruit with patience.
Romans 9:18 Therefore He has mercy on whom He wills, and whom He wills He hardens.
Hebrews 3:17-19 Now with whom was He angry forty years? Was it not with those who sinned, whose corpses fell in the wilderness? And to whom did He swear that they would not enter His rest, but to those who did not obey? So we see that they could not enter in because of unbelief.
Exodus 14:4 Then I will harden Pharaoh's heart, so that he will pursue them; and I will gain honor over Pharaoh and over all his army, that the Egyptians may know that I am the LORD." And they did so.
Daniel 5:20 But when his heart was lifted up, and his spirit was hardened in pride, he was deposed from his kingly throne, and they took his glory from him.
Matthew 19:7-8 They said to Him, “Why then did Moses command to give a certificate of divorce, and to put her away?” He said to them, “Moses, because of the hardness of your hearts, permitted you to divorce your wives, but from the beginning it was not so.
Mark 8:17-21 But Jesus, being aware of it, said to them, “Why do you reason because you have no bread? Do you not yet perceive nor understand? Is your heart still hardened? Having eyes, do you not see? And having ears, do you not hear? And do you not remember? When I broke the five loaves for the five thousand, how many baskets full of fragments did you take up?' They said to Him, 'Twelve.' “Also, when I broke the seven for the four thousand, how many large baskets full of fragments did you take up?” And they said, “Seven.” So He said to them, 'How is it you do not understand?'
Hebrews 4:7 again He designates a certain day, saying in David, 'Today,' after such a long time, as it has been said: ' Today, if you will hear His voice, Do not harden your hearts.'