John 14:5
Thomas said to him, "Master, we do not know where you are going; how can we know the way?"
John 11:16
So Thomas the Twin said to his fellow-disciples, "Let us go also, and die with him."
Mark 8:17-18
And he noticed it and said to them, "Why do you discuss your being without bread? Do you not yet see nor understand? Are your minds so dull?
Mark 9:19
He answered them and said, "O you unbelieving people, how long must I be with you? How long must I put up with you? Bring him here to me!"
Luke 24:25
Then he said to them, "How foolish you are and how slow to believe all that the prophets have said!
John 15:12
The command that I give you is to love one another just as I have loved you.
John 20:25-28
So the rest of the disciples said to him, "We have seen the Master!" But he said to them, "Unless I see the marks of the nails in his hands, and put my finger into them, and put my hand into his side, I will never believe it!"
Hebrews 5:11-12
I have much to say to you about this, but it is difficult to make it clear to you, because you have become so slow of apprehension.