John 20:26 (KJV)

Then said Jesus to them again, Peace be unto you: as my Father hath sent me, even so send I you.

And when he had said this, he breathed on them, and saith unto them, Receive ye the Holy Ghost:

Whose soever sins ye remit, they are remitted unto them; and whose soever sins ye retain, they are retained.

But Thomas, one of the twelve, called Didymus, was not with them when Jesus came.

The other disciples therefore said unto him, We have seen the LORD. But he said unto them, Except I shall see in his hands the print of the nails, and put my finger into the print of the nails, and thrust my hand into his side, I will not believe.

Then saith he to Thomas, Reach hither thy finger, and behold my hands; and reach hither thy hand, and thrust it into my side: and be not faithless, but believing.

And Thomas answered and said unto him, My LORD and my God.

Jesus saith unto him, Thomas, because thou hast seen me, thou hast believed: blessed are they that have not seen, and yet have believed.

And many other signs truly did Jesus in the presence of his disciples, which are not written in this book:

But these are written, that ye might believe that Jesus is the Christ, the Son of God; and that believing ye might have life through his name.