Mark 6:52
For they had not learned the lesson taught by the loaves, but their minds were dull.
Mark 3:5
Grieved and indignant at the hardening of their hearts, He looked round on them with anger, and said to the man, "Stretch out your arm." He stretched it out, and the arm was completely restored.
Mark 8:17-21
He perceived what they were saying, and He said to them, "What is this discussion of yours about having no bread? Do you not yet see and understand? Are your minds so dull of comprehension?
Matthew 16:9-11
Do you not yet understand? nor even remember the 5,000 and the five loaves, and how many basketfuls you carried away,
Mark 7:18
"Have *you* also so little understanding?" He replied; "do you not understand that anything whatever that enters a man from outside cannot make him unclean,
Mark 16:14
Later still He showed Himself to the Eleven themselves whilst they were at table, and He upbraided them with their unbelief and obstinacy in not having believed those who had seen Him alive.
Luke 24:25
"O dull-witted men," He replied, "with minds so slow to believe all that the Prophets have spoken!
Romans 11:7
How then does the matter stand? It stands thus. That which Israel are in earnest pursuit of, they have not obtained; but God's chosen servants have obtained it, and the rest have become hardened.