25 Then He said to them, "O men sluggish in mind and slow in heart to believe all that the prophets have said!
Luke 24:25 Cross References - Williams
Mark 7:18
18 And He answered them, "Are you too without understanding yet? Do you not know that nothing from the outside that goes into a man can make him foul,
Mark 8:17-18
Mark 9:19
19 He answered them, "Oh, you unbelieving people of the times! How long must I be with you! How long must I put up with you! Bring him to me."
Mark 16:14
14 Later on He appeared to the Eleven themselves while they were at table, and reproved them for their lack of faith and their stubbornness, because they had not believed those who had seen Him after He had been raised from the dead.
Hebrews 5:11-12
11 I have much to say to you about Him, but it is difficult to make it clear to you, since you have become so dull in your spiritual senses.
12 For although you ought to be teachers of others because you have been Christians so long, you actually need someone to teach you over and over again the very elements of the truths that God has given us, and you have gotten into such a state that you are in constant need of milk instead of solid food.