What the Bible says about performing miracles

And as ye go, preach, saying, The kingdom of heaven is at hand.

Heal the sick, cleanse the lepers, raise the dead, cast out devils: freely ye have received, freely give. (Matthew 10: 7-8)

Now when John had heard in the prison the works of Christ, he sent two of his disciples,

And said unto him, Art thou he that should come, or do we look for another?

Jesus answered and said unto them, Go and shew John again those things which ye do hear and see:

The blind receive their sight, and the lame walk, the lepers are cleansed, and the deaf hear, the dead are raised up, and the poor have the gospel preached to them. (Matthew 11: 2-5)

Verily, verily, I say unto you, He that believeth on me, the works that I do shall he do also; and greater works than these shall he do; because I go unto my Father. (John 14: 12)

And by the hands of the apostles were many signs and wonders wrought among the people;

Insomuch that they brought forth the sick into the streets, and laid them on beds and couches, that at the least the shadow of Peter passing by might overshadow some of them.

There came also a multitude out of the cities round about unto Jerusalem, bringing sick folks, and them which were vexed with unclean spirits: and they were healed every one. (Acts 5: 12-16)