John 14:5
Thomas saith to him, We know not whither thou art going; and how can we know the way?
John 11:16
Then said Thomas, (called Didymus, the twin,) to his fellow-disciples, Let us go too, that we may die with him.
Mark 8:17-18
And Jesus knowing it said unto them, Why reason ye together, because ye have no loaves? Do ye not yet consider, nor understand? Have ye your heart yet hardened?
Mark 9:19
Then addressing him, he said, O faithless generation, how long shall I be with you? how long shall I bear with you? bring him to me.
Luke 24:25
And he said unto them, O ye void of understanding, and slow of heart to believe all that the prophets have spoken!
John 15:12
This is my commandment, That ye love one another, just as I have loved you.
John 20:25-28
Then the other disciples said to him, We have seen the Lord. But he said to them, Except I should see in his hands the print of the nails, and put my finger into the print of the nails, and thrust my hand into his side, I shall never believe it.
Hebrews 5:11-12
Concerning whom we have much to discourse, and of difficult interpretation to explain, seeing ye are dull of hearing.