25 Then He said to them, "O you foolish, and slow of heart to believe in all that the prophets have spoken!
Luke 24:25 Cross References - CAB
Mark 7:18
18 So He said to them, "Are you also without understanding? Do you not understand that everything entering a man from outside cannot defile him,
Mark 8:17-18
Mark 9:19
19 He answered him and said, "O unbelieving generation, how long shall I be with you? How long shall I bear with you? Bring him to Me."
Mark 16:14
14 Afterwards He appeared to the eleven as they were reclining at the table; and He rebuked their unbelief and hardness of heart, because they did not believe those who saw Him after He had been raised.
Hebrews 5:11-12
11 concerning whom we have much to say, and it is hard to explain, since you have become sluggish in hearing.
12 For indeed, although you ought to be teachers by this time, again you have need for someone to teach you what are the elements of the beginning of the oracles of God; and you have come to need milk and not solid food.