Matthew 13:51

"Do you understand all these stories?" They answered Him, "Yes."

Matthew 15:16-17

And He said, "Are you too, even yet, without understanding?

Matthew 16:11

How is it that you do not understand that I did not speak to you about bread, when I said, keep on guarding yourselves against the yeast of the Pharisees and the Sadducees?"

Mark 4:13

Then He said to them: "If you do not understand this story, how, indeed, can you understand any of my stories?

Luke 9:45

But they remained ignorant of what this meant; indeed, it had been hidden from them, so that they did not grasp it, and they were afraid to ask Him about this statement.

Acts 8:30

Then Philip ran up and listened to him reading the prophet Isaiah, and he asked, "Do you understand what you are reading?"

Treasury of Scripture Knowledge

Summary

Say now to the rebellious house, Know ye not what these things mean? tell them, Behold, the king of Babylon is come to Jerusalem, and hath taken the king thereof, and the princes thereof, and led them with him to Babylon;

Bible References

Know

Matthew 13:51
"Do you understand all these stories?" They answered Him, "Yes."
Matthew 15:16
And He said, "Are you too, even yet, without understanding?
Matthew 16:11
How is it that you do not understand that I did not speak to you about bread, when I said, keep on guarding yourselves against the yeast of the Pharisees and the Sadducees?"
Mark 4:13
Then He said to them: "If you do not understand this story, how, indeed, can you understand any of my stories?
Luke 9:45
But they remained ignorant of what this meant; indeed, it had been hidden from them, so that they did not grasp it, and they were afraid to ask Him about this statement.
Acts 8:30
Then Philip ran up and listened to him reading the prophet Isaiah, and he asked, "Do you understand what you are reading?"