Hebrews 5:11
About this we have much to say, and it is hard to explain, since you have become dull of hearing.
2 Peter 3:16
as he does in all his letters when he speaks in them of these matters. There are some things in them that are hard to understand, which the ignorant and unstable twist to their own destruction, as they do the other Scriptures.
Matthew 13:15
For this people's heart has grown dull, and with their ears they can barely hear, and their eyes they have closed, lest they should see with their eyes and hear with their ears and understand with their heart and turn, and I would heal them.'
Isaiah 6:10
Make the heart of this people dull, and their ears heavy, and blind their eyes; lest they see with their eyes, and hear with their ears, and understand with their hearts, and turn and be healed."
Mark 8:17-18
And Jesus, aware of this, said to them, "Why are you discussing the fact that you have no bread? Do you not yet perceive or understand? Are your hearts hardened?
Mark 8:21
And he said to them, "Do you not yet understand?"
Luke 24:25
And he said to them, "O foolish ones, and slow of heart to believe all that the prophets have spoken!
John 6:6
He said this to test him, for he himself knew what he would do.
John 16:12
"I still have many things to say to you, but you cannot bear them now.
Acts 28:27
For this people's heart has grown dull, and with their ears they can barely hear, and their eyes they have closed; lest they should see with their eyes and hear with their ears and understand with their heart and turn, and I would heal them.'
1 Kings 10:1
Now when the queen of Sheba heard of the fame of Solomon concerning the name of the LORD, she came to test him with hard questions.