Mark 8:17
He noted this and said to them, "Why do you argue you have no bread? Do you not see, do you not understand, even yet? Are you still dull of heart?
Mark 6:52
for they had not understood the lesson of the loaves; their minds were dull.
Matthew 15:17
Do you not see how all that enters the mouth passes into the belly and is then thrown out into the drain,
Matthew 16:8-9
When Jesus noted this he said, "How little trust you have in me! Why all this talk, because you have brought no bread?
Mark 2:8
Conscious at once that they were arguing to themselves in this way, Jesus asked them, "Why do you argue thus in your hearts?
Mark 3:5
Then glancing round him in anger and vexation at their obstinacy he told the man, "Stretch out your hand." He stretched it out and his hand was quite restored.
Mark 16:14
Afterwards he appeared at table to the eleven themselves and reproached them for their unbelief and dulness of mind, because they had not believed those who saw him risen from the dead. [But they excused themselves, saying, "This age of lawlessness and unbelief lies under the sway of Satan, who will not allow what lies under the unclean spirits to understand the truth and power of God; therefore," they said to Christ, "reveal your righteousness now." Christ answered them, "The term of years for Satan's power has now expired, but other terrors are at hand. I was delivered to death on behalf of sinners, that they might return to the truth and sin no more, that they might inherit that glory of righteousness which is spiritual and imperishable in heaven."]
Luke 24:25
He said to them, "O foolish men, with hearts so slow to believe, after all the prophets have declared!
John 2:24-25
Jesus, however, would not trust himself to them; he knew all men,
John 16:30
Now we are sure you know everything, and need no one to put questions to you. This makes us believe you have come forth from God."
John 21:17
For the third time he asked him, "Simon, son of John, do you love me?" Now Peter was vexed at being asked a third time, "Do you love me?" So he replied; "Lord, you know everything, you can see I love you." Jesus said, "Then feed my sheep.
Hebrews 4:12-13
For the Logos of God is a living thing, active and more cutting than any sword with double edge, penetrating to the very division of soul and spirit, joints and marrow ??scrutinizing the very thoughts and conceptions of the heart.
Hebrews 5:11-12
On this point I have a great deal to say, which it is hard to make intelligible to you. For you have grown dull of hearing.
Revelation 2:23
and her children I will exterminate. So shall all the churches know that I am the searcher of the inmost heart; I will requite each of you according to what you have done.