When Jesus saw their faith, he said unto the sick of the palsy, Son, thy sins be forgiven thee. [6] But there were certain of the scribes sitting there, and reasoning in their hearts, [7] Why doth this man thus speak blasphemies? who can forgive sins but God only? [8] And immediately when Jesus perceived in his spirit that they so reasoned within themselves, he said unto them, Why reason ye these things in your hearts? [9] Whether is it easier to say to the sick of the palsy, Thy sins be forgiven thee; or to say, Arise, and take up thy bed, and walk? [10] But that ye may know that the Son of man hath power on earth to forgive sins, (he saith to the sick of the palsy,) [11] I say unto thee, Arise, and take up thy bed, and go thy way into thine house. [12] And immediately he arose, took up the bed, and went forth before them all; insomuch that they were all amazed, and glorified God, saying, We never saw it on this fashion. (Mark 2:5-12)

But I have greater witness than that of John: for the works which the Father hath given me to finish, the same works that I do, bear witness of me, that the Father hath sent me. (John 5:36)

And these signs shall follow them that believe; In my name shall they cast out devils; they shall speak with new tongues; [18] They shall take up serpents; and if they drink any deadly thing, it shall not hurt them; they shall lay hands on the sick, and they shall recover. [19] So then after the Lord had spoken unto them, he was received up into heaven, and sat on the right hand of God. [20] And they went forth, and preached every where, the Lord working with them, and confirming the word with signs following. Amen. (Mark 16:17-20)

How shall we escape, if we neglect so great salvation; which at the first began to be spoken by the Lord, and was confirmed unto us by them that heard him; [4] God also bearing them witness, both with signs and wonders, and with divers miracles, and gifts of the Holy Ghost, according to his own will? (Hebrews 2:3-4)