27 They understood not that he spoke to them of the Father.
John 8:27 Cross References - KJ2000
Isaiah 6:9
9 And he said, Go, and tell this people, Hear you indeed, but understand not; and see you indeed, but perceive not.
Isaiah 42:18-20
Isaiah 59:10
10 We grope for the wall like the blind, and we grope as if we had no eyes: we stumble at noonday as in the twilight; we are in desolate places as dead men.
John 8:43
43 Why do you not understand my speech? even because you cannot hear my word.
John 8:47
47 He that is of God hears God's words: you therefore hear them not, because you are not of God.
Romans 11:7-10
7 What then? Israel has not obtained that which it seeks for; but the election has obtained it, and the rest were blinded
8 (According as it is written, God has given them the spirit of slumber, eyes that they should not see, and ears that they should not hear;) unto this day.
9 And David says, Let their table be made a snare, and a trap, and a stumbling block, and a recompense unto them:
10 Let their eyes be darkened that they may not see, and bow down their back always.