John 14:5
Thomas said to him, "Lord, we don't know where you are going. How can we know the way?"
John 11:16
Thomas therefore, who is called Didymus, said to his fellow disciples, "Let's go also, that we may die with him."
Mark 8:17-18
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?
Mark 9:19
He answered him, "Unbelieving generation, how long shall I be with you? How long shall I bear with you? Bring him to me."
Luke 24:25
He said to them, "Foolish men, and slow of heart to believe in all that the prophets have spoken!
John 15:12
"This is my commandment, that you love one another, even 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 hand into his side, I will not believe."
Hebrews 5:11-12
About him we have many words to say, and hard to interpret, seeing you have become dull of hearing.