Mark 8:21

And He said to them, “Don’t you understand yet?”

Mark 6:52

because they had not understood about the loaves. Instead, their hearts were hardened.

Psalm 94:8

Pay attention, you stupid people!
Fools, when will you be wise?

Matthew 16:11-12

Why is it you don’t understand that when I told you, ‘Beware of the yeast of the Pharisees and Sadducees,’ it wasn’t about bread?”

Mark 8:12

But sighing deeply in His spirit, He said, “Why does this generation demand a sign? I assure you: No sign will be given to this generation!”

Mark 8:17

Aware of this, He said to them, “Why are you discussing that you do not have any bread? Don’t you understand or comprehend? Is your heart hardened?

Mark 9:19

He replied to them, “You unbelieving generation! How long will I be with you? How long must I put up with you? Bring him to Me.”

John 14:9

Jesus said to him, “Have I been among you all this time without your knowing Me, Philip? The one who has seen Me has seen the Father. How can you say, ‘Show us the Father’?

1 Corinthians 6:5

I say this to your shame! Can it be that there is not one wise person among you who is able to arbitrate between his brothers?

1 Corinthians 15:34

Come to your senses and stop sinning, for some people are ignorant about God. I say this to your shame.

Treasury of Scripture Knowledge

Summary

Mark 8:21

And he said unto them, How is it that ye do not understand?

How

General references

Matthew 16:10

Bible References

How