Mark 6:52
because they did not understand concerning the loaves, but their hearts were hardened.
Mark 3:5
And looking around at them with anger, grieved at the hardness of their hearts, he said to the man, "Stretch out your hand." And he stretched [it] out, and his hand was restored.
Mark 8:17-21
And knowing [this], he said to them, "Why are you discussing that you have no bread? Do you not yet perceive or understand? Have your hearts been hardened?
Isaiah 63:17
Why do you make us wander, Yahweh? You harden our heart from your ways {so that we do not fear} you. Turn back for the sake of your servants, the tribes of your inheritance.
Matthew 16:9-11
Do you not yet understand or do you not remember the five loaves for the five thousand, and how many baskets you took up?
Mark 7:18
And he said to them, "So are you also without understanding? Do you not understand that everything [that is] outside that goes into a person [is] not able to defile him?
Mark 16:14
And later, [while] they were reclining at table, he appeared to the eleven. And he reprimanded their unbelief and hardness of heart, because they did not believe those who had seen him [after he] had been raised.
Luke 24:25
And he said to them, "O foolish and slow in heart to believe in all that the prophets have spoken!
Romans 11:7
What then? What Israel was searching for, this it did not obtain. But the elect obtained [it], and the rest were hardened,