John 14:5
Thomas said, "Lord, we don't know where you are going. How can we know the way?"
John 11:16
So Thomas (called Didymus) said to his fellow disciples, "Let us go too, so that we may die with him."
Mark 8:17-18
When he learned of this, Jesus said to them, "Why are you arguing about having no bread? Do you still not see or understand? Have your hearts been hardened?
Mark 9:19
He answered them, "You unbelieving generation! How much longer must I be with you? How much longer must I endure you? Bring him to me."
Luke 24:25
So he said to them, "You foolish people -- how slow of heart to believe all that the prophets have spoken!
John 15:12
My commandment is this -- to love one another just as I have loved you.
John 20:25-28
The other disciples told him, "We have seen the Lord!" But he replied, "Unless I see the wounds from the nails in his hands, and put my finger into the wounds from the nails, and put my hand into his side, I will never believe it!"
Hebrews 5:11-12
On this topic we have much to say and it is difficult to explain, since you have become sluggish in hearing.