Luke 24:25

And He said unto them, O people void of understanding and slow of heart to believe all that the prophets have spoken.

Mark 7:18

And He saith unto them, Are ye so void of understanding also? Do ye not know, that whatsoever from without entreth into a man cannot defile him?

Mark 8:17-18

And Jesus knowing it saith unto them, What are ye reasoning about? because ye have no bread? Do ye not yet discern nor understand? have ye your heart still hardened?

Mark 9:19

And He answered and said, O unbelieving generation, how long shall I be with you? how long shall I bear with you? bring him to me.

Mark 16:14

At last he appeared to the eleven as they were sitting at table, and upbraided them with their unbelief, and hardness of heart; because they did not believe those who had seen Him after He was risen.

Hebrews 5:11-12

Concerning whom we have much to say and difficult to be explained, since ye are become 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 saith unto them, Are ye so void of understanding also? Do ye not know, that whatsoever from without entreth into a man cannot defile him?

And Jesus knowing it saith unto them, What are ye reasoning about? because ye have no bread? Do ye not yet discern nor understand? have ye your heart still hardened?

And He answered and said, O unbelieving generation, how long shall I be with you? how long shall I bear with you? bring him to me.

At last he appeared to the eleven as they were sitting at table, and upbraided them with their unbelief, and hardness of heart; because they did not believe those who had seen Him after He was risen.

Concerning whom we have much to say and difficult to be explained, since ye are become dull of hearing.

General references

but how then should the scriptures be fulfilled, which say that thus it must be?

And He saith unto them, Are ye so void of understanding also? Do ye not know, that whatsoever from without entreth into a man cannot defile him?

But they understood none of these things; and this matter was hid from them, so that they knew not the things which were spoken.