Mark 6:52
For they had not yet derived understanding in the loaves, for their hearts were blind.
Mark 3:5
And looking round about on them with anger, being grieved for the blindness of their hearts, he said unto the man, Stretch forth thine hand. And he stretched it out and his hand was restored whole as the other.
Mark 8:17-21
And as Jesus understood it, he said unto them, Why argue ye because ye have no bread? Do ye not consider nor understand? is your heart yet blind?
Isaiah 63:17
O LORD, why hast thou made us to err from thy ways? Hast thou hardened our heart to thy fear? Return for thy slaves, for the tribes of thine inheritance.
Matthew 16:9-11
Do ye not yet understand, neither remember the five loaves of the five thousand, and how many baskets ye took up?
Mark 7:18
And he said unto them, Are ye so without understanding also? Do ye not understand that anything from outside that enters into the man cannot defile him?
Mark 16:14
Finally he appeared unto the eleven as they sat at the table and upbraided them for their unbelief and hardness of heart because they did not believe those who had seen him after he was risen.
Luke 24:25
Then he said unto them, O fools, and slow of heart to believe all that the prophets have spoken;
Romans 11:7
What then? Israel has not obtained that which he seeks after; but the elect have obtained it, and the rest were blinded