And afterward He was manifested to the eleven themselves, as they were reclining at table, and upbraided them for their unbelief and hardness of heart, because they believed not those who saw Him after He had risen. And He said to them, "Going into all the world, preach the Gospel to the whole creation. He that believes and is immersed shall be saved; but he that disbelieves shall be condemned. read more.
And these signs shall accompany those having believed: in My name will they cast out demons: they will speak with tongues; they will take up serpents; and, if they drink any deadly thing, it will not hurt them; they will lay hands on the sick, and they will recover."

Luke 24:36-49

Now, as they were telling these things, He Himself stood in the midst of them, and saith to them, "Peace be to you!" But, being terrified and frightened, they were supposing that they were beholding a spirit. And He said to them, "Why are ye troubled? and wherefore do questionings arise in your heart? read more.
See My hands and My feet, that it is I Myself; handle Me, and see; because a spirit does not have flesh and bones, as ye behold Me having." And, saying this, He showed them His hands and His feet. And, while they still disbelieved for joy, and marvelled, He said to them, "Have ye here anything to eat?" And they gave Him a piece of a broiled fish; and, taking it, He ate before them. And He said to them, "These are My words which I spake to you, while being yet with you: that all things must be fulfilled, that have been written in the law of Moses, and the prophets, and the Psalms, concerning Me." Then He opened their mind, that they might understand the Scriptures; and He said to them, "Thus it has been written, that the Christ should suffer, and rise from the dead on the third day, and that repentance and remission of sins should be preached in His name to all the nations, beginning from Jerusalem. Ye are witnesses of these things, And, behold, I send forth the promise of My Father upon you; but abide ye in the city, until ye be clothed with power from on high."

John 20:19-23

When, therefore, it was evening, on that day, the first day of sabbaths; and, when, through fear of the Jews, the doors were shut, where the disciples were; Jesus came and stood in the midst, and saith to them, "Peace be to you!" And, having said this, He showed them both His hands and His side. The disciples, therefore, rejoiced, when they saw the Lord. Jesus, therefore, said to them again, "Peace be to you! As the Father hath sent Me, I also send you." read more.
And, having said this, He breathed upon them, and said to them, "Receive ye the Holy Spirit. Whosesoever sins ye remit, they are remitted to them; whosesoever sins ye retain, they are retained."