Mark 8:21
And he said to them, How is it that ye do not understand?
Mark 6:52
For they considered not the miracle of the loaves; for their heart was hardened.
Psalm 94:8
Understand, ye brutish among the people: and ye fools, when will ye be wise?
Matthew 16:11-12
How is it that ye do not understand that I spoke not to you concerning bread, that ye should beware of the leaven of the Pharisees and of the Sadducees?
Mark 8:12
And he sighed deeply in his spirit, and saith, Why doth this generation seek for a sign? Verily I say to you, There shall no sign be given to this generation.
Mark 8:17
And when Jesus knew it, he saith to them, Why reason ye, because ye have no bread? perceive ye not yet, neither understand? have ye your heart yet hardened?
Mark 9:19
He answered him, and saith, O faithless generation, how long shall I be with you, how long shall I suffer you? bring him to me.
John 14:9
Jesus saith to him, Have I been so long time with you, and yet hast thou not known me Philip? he that hath seen me, hath seen the Father; and how sayest thou then, Show us the Father?
1 Corinthians 6:5
I speak to your shame. Is it so, that there is not a wise man among you? no, not one that will be able to judge between his brethren?
1 Corinthians 15:34
Awake to righteousness, and sin not; for some have not the knowledge of God. I speak this to your shame.