Mark 8:21
And He said to them, "Do ye not yet understand?"
Mark 6:52
for they did not understand concerning the loaves, but their heart was hardened.
Matthew 16:11-12
How is it that ye do not perceive that I spake not to you concerning bread? but beware of the leaven of the Pharisees and Sadducees?
Mark 8:12
And, sighing deeply in His spirit, He saith, "Why does this generation seek a sign? verily I say to you, there shall no sign be given to this generation."
Mark 8:17
And perceiving it, He saith to them, "Why are ye reasoning because ye have no bread? Do ye not yet perceive, nor understand? Have ye your heart hardened?
Mark 9:19
And He, answering, saith to them, "O faithless generation! how long shall I be with you! how long shall I bear with you? Bring him to Me."
John 14:9
Jesus saith to him, "So long a time am I with you, and you do not know Me, Philip! He who has seen Me has seen the Father; how say you, 'Show us the Father?'
1 Corinthians 6:5
I speak to your shame! Is it so, that there is not among you even one wise man, who will be able to judge between his brethren?
1 Corinthians 15:34
Awake to soberness righteously, and sin not; for some have not a knowledge of God: I say it to your shame!