GOD'S WORD® Translation
Jesus knew what they were saying and asked them, "Why are you discussing the fact that you don't have any bread? Don't you understand yet? Don't you catch on? Are your minds closed?

American Standard Version
And Jesus perceiving it saith unto them, Why reason ye, because ye have no bread? do ye not yet perceive, neither understand? have ye your heart hardened?

Berean Study Bible
Aware of their conversation, Jesus asked them, “Why are you debating about having no bread? Do you still not see or understand? Do you have such hard hearts?

Douay-Rheims Bible
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?

English Revised Version
And Jesus perceiving it saith unto them, Why reason ye, because ye have no bread? do ye not yet perceive, neither understand? have ye your heart hardened?

King James Bible
And when Jesus knew it, he saith unto them, Why reason ye, because ye have no bread? perceive ye not yet, neither understand? have ye your heart yet hardened?

World English Bible
Jesus, perceiving it, said to them, "Why do you reason that it's because you have no bread? Don't you perceive yet, neither understand? Is your heart still hardened?

Young's Literal Translation
And Jesus having known, saith to them, 'Why do ye reason, because ye have no loaves? do ye not yet perceive, nor understand, yet have ye your heart hardened?

Mark 8:17 Additional Translations ...