John 20:24-29

Now Thomas (also known as Didymus [both names mean "twin"]), one of the Twelve, was not with the disciples when Jesus came. So the other disciples told him, "We have seen the Lord!" But he said to them, "Unless I see the nail marks in his hands and put my finger where the nails were, and put my hand into his side, I will not believe." A week later his disciples were in the house again, and Thomas was with them. Though the doors were locked, Jesus came and stood among them and said. "Peace be with you!" Then he said to Thomas, "Put your finger here; see my hands. Reach out your hand and put it into my side. Stop doubting and believe." Thomas said to him, "My Lord and my God!" Then Jesus told him, "Because you have seen me, you have believed; blessed are those who have not seen and yet have believed."

Now Thomas 
John 11:16  Then Thomas (also known as Didymus) said to the rest of the disciples, "Let us also go, that we may die with him."
John 14:5  Thomas said to him, "Lord, we don't know where you are going, so how can we know the way?"
John 21:1-2  Afterward Jesus appeared again to his disciples, by the sea of Galilee. It happened this way: Simon Peter, Thomas (also known as Didymus), Nathanael from Cana in Galilee, the sons of Zebedee, and two other disciples were together. 
Acts 1:13  When they arrived, they went upstairs to the room where they were staying. Those present were Peter, John, James and Andrew; Philip and Thomas, Bartholomew and Matthew; James son of Alphaeus and Simon the Zealot, and Judas son of James.

Unless I see the nail marks in his hands and put my finger where the nails were, and put my hand into his side 
John 20:20  After he said this, he showed them his hands and side. The disciples were overjoyed when they saw the Lord.

I will not believe 
Mark 16:11  When they heard that Jesus was alive and that she had seen him, they did not believe it.

Peace be with you 
John 14:27  "Peace I leave with you; my peace I give you. I do not give to you as the world gives. Do not let your hearts be troubled and do not be afraid."

Stop doubting and believe 
Luke 24:40  When he had said this, he showed them his hands and feet.

Because you have seen me, you have believed 
John 3:15  "... that everyone who believes may have eternal life in him."

blessed are those who have not seen and yet have believed 
1 Peter 1:8-9  Though you have not seen him, you love him; and even though you do not see him now, you believe in him and are filled with an inexpressible and glorious joy, for you are receiving the end result of your faith, the salvation of your souls.

[brackets are mine]

Scriptures taken from the Holy Bible, New International Version® NIV®, 
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