John 20:20-24

And when he had so said, he shewed unto them his hands and his side. Then were the disciples glad, when they saw the Lord.

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.