John 14:5
Thomas saith to him, Lord, we know not whither thou goest; how then do we know the way?
John 11:16
Then said Thomas, who was called Didymus, to his fellowdisciples, Let us also go, that we may die with him.
Mark 8:17-18
And knowing it, he saith to them, Why are ye reasoning, because ye have no bread? Do ye not yet perceive nor understand? Have ye your mind still blinded?
Mark 9:19
He answereth and saith to them, O unbelieving 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 to them, O dull of apprehension, and slow of heart to believe all that the Prophets have spoken!
John 15:12
This is my commandment, that ye love one another, as I have loved you.
John 20:25-28
The other disciples therefore said to him, We have seen the Lord. But he said to them, Unless I see in his hands the print of the nails, and put my finger into the place of the nails, and put my hand into his side, I shall not believe.
Hebrews 5:11-12
Of whom we have much to say, and hard to be explained, seeing ye have become dull of hearing.