Mark 8:21
And he said to them, 'How do ye not understand?'
Mark 6:52
for they understood not concerning the loaves, for their heart hath been hard.
Psalm 94:8
Consider, ye brutish among the people, And ye foolish, when do ye act wisely?
Matthew 16:11-12
how do ye not understand that I did not speak to you of bread -- to take heed of the leaven of the Pharisees and Sadducees?'
Mark 8:12
and having sighed deeply in his spirit, he saith, 'Why doth this generation seek after a sign? Verily I say to you, no sign shall be given to this generation.'
Mark 8:17
And Jesus having known, saith to them, 'Why do ye reason, because ye have no loaves? do ye not yet perceive, nor understand, yet have ye your heart hardened?
Mark 9:19
And he answering him, said, 'O generation unbelieving, till when shall I be with you? till when shall I suffer you? bring him unto me;'
John 14:9
Jesus saith to him, 'So long time am I with you, and thou hast not known me, Philip? he who hath seen me hath seen the Father; and how dost thou say, Shew to us the Father?
1 Corinthians 6:5
unto your shame I speak: so there is not among you one wise man, not even one, who shall be able to discern in the midst of his brethren!
1 Corinthians 15:34
awake up, as is right, and sin not; for certain have an ignorance of God; for shame to you I say it.