Luke 18:34

But they did not understand about these things, and this statement was an insoluble riddle to them; they did not even begin to grasp what He meant.

Mark 9:32

But they did not understand what this statement meant, and they were afraid to ask Him.

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.

Luke 2:50

But they did not understand what He said to them.

Luke 24:25

Then He said to them, "O men sluggish in mind and slow in heart to believe all that the prophets have said!

Luke 24:45

Then He opened their minds so that they might continue to understand the Scriptures,

John 10:6

Jesus told them this allegory, but they did not understand what He meant by it.

John 12:16

His disciples at the time did not understand this, but after Jesus was glorified, they remembered that this had been written about Him and that they had fulfilled it in His case.

John 16:1-19

"I have told you these things to keep you from falling over stumbling blocks.

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