25 And He said to them, O fools and slow of heart to believe all things that the prophets spoke!
Luke 24:25 Cross References - MKJV
Mark 7:18
18 And He said to them, Are you also without understanding? Do you not perceive that whatever enters into the man from outside cannot defile him,
Mark 8:17-18
Mark 9:19
19 He answered him and said, O faithless generation, how long shall I be with you? How long shall I bear with you? Bring him to Me!
Mark 16:14
14 Afterward He appeared to the Eleven as they reclined. And He reproached their unbelief and hardness of heart, because they did not believe those who had seen Him after He had risen.
Hebrews 5:11-12
11 of whom we have much to say, and hard to be explained since you are dull of hearing.
12 For indeed because of the time, you ought to be teachers, you have need that one teach you again what are the first principles of the oracles of God. And you have become in need of milk, and not of solid food.