Mark 8:17-21

Having eyes, see ye not? and having ears, hear ye not? and do ye not remember?

Luke 24:25

Then he said unto them, O fools, and slow of heart to believe all that the prophets have spoken:

Isaiah 63:17

O LORD, why hast thou made us to err from thy ways, {and} hardened our heart from thy fear? Return for thy servants' sake, the tribes of thine inheritance.

Mark 16:14

Afterward he appeared unto the eleven as they sat at meat, and upbraided them with their unbelief and hardness of heart, because they believed not them which had seen him after he was risen. {at meat: or, together}

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

Because it entereth not into his heart, but into the belly, and goeth out into the draught, purging all meats?

Mark 3:5

And when he had looked round about on them with anger, being grieved for the hardness of their hearts, he saith unto the man, Stretch forth thine hand. And he stretched {it} out: and his hand was restored whole as the other. {hardness: or, blindness}

Romans 11:7

What then? Israel hath not obtained that which he seeketh for; but the election hath obtained it, and the rest were blinded {blinded: or, hardened}