Mark 8:17

And Jesus perceived it, and said to them: Why do you reason, because you have no bread? Do you not yet perceive, nor understand? Is your heart still hardened?

Mark 6:52

for they had learned nothing from the loaves: for their heart was hardened.

Matthew 15:17

Do you not yet understand that whatever enters the mouth passes into the belly, and is cast out into the sink?

Matthew 16:8-9

And Jesus perceiving it, said to them: you of little faith! why are you reasoning among yourselves because you took no bread?

Mark 2:8

And Jesus, immediately perceiving in his spirit that they thus reasoned within themselves, said to them: Why are you reasoning thus in your hearts?

Mark 3:5

And looking around on them with anger, being grieved for the hardness of their heart, he said to the man: Stretch forth your hand; and he stretched it forth: and his hand was restored.

Mark 16:14

Afterward he appeared to the eleven as they reclined at table; and he reproached them for their unbelief and hardness of heart, because they did not believe those who had seen him after he had risen.

Luke 24:25

And he said to them: inconsiderate, and slow of heart to believe all things that the prophets have spoken!

John 2:24-25

But Jesus did not trust himself to them, because he knew all men,

John 16:30

Now we know that thou knowest all things, and hast no need that any one should ask thee. By this we believe that thou hast come forth from God.

John 21:17

He said to him a third time: Simon, son of Jonah, do you love me? Peter was grieved because he said to him the third time, Do you love me? And he said to him: Lord, thou knowest all things, thou knowest that I love thee. Jesus said to him: Feed my sheep.

Hebrews 4:12-13

For the word of God is living and powerful, and sharper than any two edged sword, and pierces even to the dividing asunder of soul and spirit, and of the joints and marrow, and is a discerner of the thoughts and intents of the heart.

Hebrews 5:11-12

Of him we have many things to say, and difficult to be explained, if we do say them, since you are slow in understanding.

Revelation 2:23

And I will kill her children with death; and all the churches shall know that I am he that searches the reins and the hearts: and I will give to every one of you according to your works.

Treasury of Scripture Knowledge

Summary

And when Jesus knew it, he saith unto them, Why reason ye, because ye have no bread? perceive ye not yet, neither understand? have ye your heart yet hardened?

Bible References

Knew

Mark 2:8
And Jesus, immediately perceiving in his spirit that they thus reasoned within themselves, said to them: Why are you reasoning thus in your hearts?
John 2:24
But Jesus did not trust himself to them, because he knew all men,
John 16:30
Now we know that thou knowest all things, and hast no need that any one should ask thee. By this we believe that thou hast come forth from God.
John 21:17
He said to him a third time: Simon, son of Jonah, do you love me? Peter was grieved because he said to him the third time, Do you love me? And he said to him: Lord, thou knowest all things, thou knowest that I love thee. Jesus said to him: Feed my sheep.
Hebrews 4:12
For the word of God is living and powerful, and sharper than any two edged sword, and pierces even to the dividing asunder of soul and spirit, and of the joints and marrow, and is a discerner of the thoughts and intents of the heart.
Revelation 2:23
And I will kill her children with death; and all the churches shall know that I am he that searches the reins and the hearts: and I will give to every one of you according to your works.

Perceive

Mark 3:5
And looking around on them with anger, being grieved for the hardness of their heart, he said to the man: Stretch forth your hand; and he stretched it forth: and his hand was restored.
Mark 6:52
for they had learned nothing from the loaves: for their heart was hardened.
Mark 16:14
Afterward he appeared to the eleven as they reclined at table; and he reproached them for their unbelief and hardness of heart, because they did not believe those who had seen him after he had risen.
Matthew 15:17
Do you not yet understand that whatever enters the mouth passes into the belly, and is cast out into the sink?
Matthew 16:8
And Jesus perceiving it, said to them: you of little faith! why are you reasoning among yourselves because you took no bread?
Luke 24:25
And he said to them: inconsiderate, and slow of heart to believe all things that the prophets have spoken!
Hebrews 5:11
Of him we have many things to say, and difficult to be explained, if we do say them, since you are slow in understanding.

General references

Matthew 13:13
For this reason I speak to them in parables; because when they see, they see not; and when they hear, they hear not, nor do they understand.
Matthew 15:16
Jesus replied: Are you also yet without understanding?
Matthew 16:10
Nor the seven loaves of the four thousand, and how many baskets you took up?
Luke 9:45
But they did not understand this saying, and it was concealed from them, that they might not understand it; and they were afraid to ask him about this saying.