17 Jesus, perceiving it, said to them, “Why do you reason that it’s because you have no bread? Don’t you perceive yet, neither understand? Is your heart still hardened?
Mark 8:17 Cross References - WEB
Isaiah 63:17
17 O Yahweh, why do you make us wander from your ways, and harden our heart from your fear? Return for your servants’ sake, the tribes of your inheritance.
Matthew 15:17
17 Don’t you understand that whatever goes into the mouth passes into the belly, and then out of the body?
Matthew 16:8-9
Mark 2:8
8 Immediately Jesus, perceiving in his spirit that they so reasoned within themselves, said to them, “Why do you reason these things in your hearts?
Mark 3:5
5 When he had looked around at them with anger, being grieved at the hardening of their hearts, he said to the man, “Stretch out your hand.” He stretched it out, and his hand was restored as healthy as the other.
Mark 6:52
52 for they hadn’t understood about the loaves, but their hearts were hardened.
Mark 16:14
14 Afterward he was revealed to the eleven themselves as they sat at the table, and he rebuked them for their unbelief and hardness of heart, because they didn’t believe those who had seen him after he had risen.
Luke 24:25
25 He said to them, “Foolish men, and slow of heart to believe in all that the prophets have spoken!
John 2:24-25
John 16:30
30 Now we know that you know all things, and don’t need for anyone to question you. By this we believe that you came from God.”
John 21:17
17 He said to him the third time, “Simon, son of Jonah, do you have affection for me?” Peter was grieved because he asked him the third time, “Do you have affection for me?” He said to him, “Lord, you know everything. You know that I have affection for you.” Jesus said to him, “Feed my sheep.
Hebrews 4:12-13
12 For the word of God is living and active, and sharper than any two-edged sword, piercing even to the dividing of soul and spirit, of both joints and marrow, and is able to discern the thoughts and intentions of the heart.
13 There is no creature that is hidden from his sight, but all things are naked and laid open before the eyes of him to whom we must give an account.
Hebrews 5:11-12
11 About him we have many words to say, and hard to interpret, seeing you have become dull of hearing.
12 For although by this time you should be teachers, you again need to have someone teach you the rudiments of the first principles of the revelations of God. You have come to need milk, and not solid food.
Revelation 2:23
23 I will kill her children with Death, and all the assemblies will know that I am he who searches the minds and hearts. I will give to each one of you according to your deeds.