Luke 24:25

And He said to them, O fools and slow of heart to believe all things that the prophets spoke!

Mark 7:18

And He said to them, Are you also without understanding? Do you not perceive that whatever enters into the man from outside cannot defile him,

Mark 8:17-18

And knowing it, Jesus said to them, Why do you reason that it is because you have no loaves? Do you not yet perceive nor understand? Have you still hardened your heart?

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 to Me!

Mark 16:14

Afterward He appeared to the Eleven as they reclined. And He reproached their unbelief and hardness of heart, because they did not believe those who had seen Him after He had risen.

Hebrews 5:11-12

of whom we have much to say, and hard to be explained since you are dull of hearing.

Treasury of Scripture Knowledge

Summary

Luke 24:25

Then he said unto them, O fools, and slow of heart to believe all that the prophets have spoken:

O fools

Hebrews 5:11

General references

Matthew 26:54

Mark 7:18

Luke 18:34

Bible References

O fools

And He said to them, Are you also without understanding? Do you not perceive that whatever enters into the man from outside cannot defile him,

And knowing it, Jesus said to them, Why do you reason that it is because you have no loaves? Do you not yet perceive nor understand? Have you still hardened your heart?

He answered him and said, O faithless generation, how long shall I be with you? How long shall I bear with you? Bring him to Me!

Afterward He appeared to the Eleven as they reclined. And He reproached their unbelief and hardness of heart, because they did not believe those who had seen Him after He had risen.

of whom we have much to say, and hard to be explained since you are dull of hearing.

General references

But how then shall the Scriptures be fulfilled, that it must be so?

And He said to them, Are you also without understanding? Do you not perceive that whatever enters into the man from outside cannot defile him,

And they did not understand any of these things. And this saying was hidden from them, nor did they know the things which were spoken.