Mark 8:21
And he said unto them, How is it that you do not understand?
Mark 6:52
For they understood not the miracle of the loaves: for their hearts were hardened.
Psalm 94:8
Understand, you senseless among the people: and you fools, when will you be wise?
Matthew 16:11-12
How is it that you do not understand that I spoke not to you concerning bread, that you should beware of the leaven of the Pharisees and of the Sadducees?
Mark 8:12
And he sighed deeply in his spirit, and said, Why does this generation seek after a sign? verily I say unto you, There shall no sign be given unto this generation.
Mark 8:17
And when Jesus knew it, he said unto them, Why reason you, because you have no bread? perceive you not yet, neither understand? have you your heart yet hardened?
Mark 9:19
He answered him, and said, O faithless generation, how long shall I be with you? how long shall I bear with you? bring him unto me.
John 14:9
Jesus said unto him, Have I been so long a time with you, and yet have you not known me, Philip? he that has seen me has seen the Father; and how say you 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 shall 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.