John 10:6

This was the allegory that Jesus told them, but they did not understand of what he was speaking.

Matthew 13:13-14

That is why I speak to them in parables, because, though they have eyes, they do not see, and though they have ears, they do not hear or understand.

Matthew 13:51

Have you understood all this?" Jesus asked. "Yes," they answered.

John 6:52

Upon this the Jews began disputing with one another: "How is it possible for this man to give us his flesh to eat?"

John 6:60

On hearing it, many of his disciples said: "This is harsh doctrine! Who can bear to listen to it?"

John 7:36

What does he mean by saying 'You will look for me, and you will not find me; and you will not be able to come where I shall be'?"

John 8:27

They did not understand that he meant the Father.

John 8:43

How is it that you do not understand what I say? It is because you cannot bear to listen to my Message.

John 16:25

I have spoken to you of all this in figures; a time is coming, however, when I shall not speak any longer to you in figures, but shall tell you about the Father plainly.

1 Corinthians 2:14

The merely intellectual man rejects the teaching of the Spirit of God; for to him it is mere folly; he cannot grasp it, because it is to be understood only by spiritual insight.

1 John 5:20

We realize, too, that the Son of God has come among us, and has given us the discernment to know the True God; and we are in union with the True God by our union with his Son, Jesus Christ. He is the True God and he is Immortal Life.

Treasury of Scripture Knowledge

Summary

This parable spake Jesus unto them: but they understood not what things they were which he spake unto them.

General references

Bible References

They understood not

John 6:52
Upon this the Jews began disputing with one another: "How is it possible for this man to give us his flesh to eat?"
John 7:36
What does he mean by saying 'You will look for me, and you will not find me; and you will not be able to come where I shall be'?"
John 8:27
They did not understand that he meant the Father.
Matthew 13:13
That is why I speak to them in parables, because, though they have eyes, they do not see, and though they have ears, they do not hear or understand.
1 Corinthians 2:14
The merely intellectual man rejects the teaching of the Spirit of God; for to him it is mere folly; he cannot grasp it, because it is to be understood only by spiritual insight.
1 John 5:20
We realize, too, that the Son of God has come among us, and has given us the discernment to know the True God; and we are in union with the True God by our union with his Son, Jesus Christ. He is the True God and he is Immortal Life.

General references

Luke 18:34
The Apostles did not comprehend any of this; his meaning was unintelligible to them, and they did not understand what he was saying.