John 8:27

They knew not that he spake to them of the Father.

Isaiah 6:9

And he will say, Go, and say to this people, Hearing, hear ye, and ye shall not understand; and seeing, see ye, and ye shall not know.

Isaiah 42:18-20

Hear, ye deaf; and look, ye blind, to see.

Isaiah 59:10

We shall feel for the wall as the blind, and we shall feel, as no eyes: we stumbled at noon as at evening twilight; in fertile fields as the dead.

John 8:43

Wherefore ye know not my speech, for ye cannot hear my word.

John 8:47

He being of God hears the words of God: therefore ye hear not, for ye are not of God.

Romans 11:7-10

What then What Israel seeks for, this be attained not; but the selection attained, and the rest were hardened.

2 Corinthians 4:3-4

And if also our good news is hid, in the lost is it hid:

Treasury of Scripture Knowledge

Summary

They understood not that he spake to them of the Father.

Bible References

General references

John 8:43
Wherefore ye know not my speech, for ye cannot hear my word.
Isaiah 6:9
And he will say, Go, and say to this people, Hearing, hear ye, and ye shall not understand; and seeing, see ye, and ye shall not know.
Isaiah 42:18
Hear, ye deaf; and look, ye blind, to see.
Isaiah 59:10
We shall feel for the wall as the blind, and we shall feel, as no eyes: we stumbled at noon as at evening twilight; in fertile fields as the dead.
Romans 11:7
What then What Israel seeks for, this be attained not; but the selection attained, and the rest were hardened.
2 Corinthians 4:3
And if also our good news is hid, in the lost is it hid: