New Revised Standard Version
Then he said to them, “Oh, how foolish you are, and how slow of heart to believe all that the prophets have declared!

Contemporary English Version
Then Jesus asked the two disciples, "Why can't you understand? How can you be so slow to believe all that the prophets said?

New American Bible
And he said to them, “Oh, how foolish you are! How slow of heart to believe all that the prophets spoke!

Douay-Rheims Bible
Then he said to them: O foolish and slow of heart to believe in all things, Which the prophets have spoken.

Then he said to them: O foolish and slow of heart to believe in all things, Which the prophets have spoken.

O fools.

Mark 7:18 And he saith to them: So are you also without knowledge? Understand you not that every thing from without entering into a man cannot defile him:

Mark 8:17,18 Which Jesus knowing, saith to them: Why do you reason, because you have no bread? Do you not yet know nor understand? Have you still your heart blinded? . . .

Mark 9:19 Who answering them, said: O incredulous generation, how long shall I be with you? How long shall I suffer you? Bring him unto me.

Mark 16:14 At length he appeared to the eleven as they were at table: and he upbraided them with their incredulity and hardness of heart, because they did not believe them who had seen him after he was risen again.

Hebrews 5:11,12 Of whom we have much to say and hard to be intelligibly uttered: because you are become weak to hear. . . .