The Gospel of John describes a miracle in which Jesus healed a beggar who had been born blind:
"Neither this man nor his parents sinned," said Jesus, "but this happened so that the works of God might be displayed in him. As long as it is day, we must do the works of him who sent me. Night is coming, when no one can work. While I am in the world, I am the light of the world."
After saying this, he spit on the ground, made some mud with the saliva, and put it on the man's eyes. "Go," he told him, "wash in the Pool of Siloam" (this word means "Sent"). So the man went and washed, and came home seeing.
His neighbors and those who had formerly seen him begging asked, "Isn't this the same man who used to sit and beg?" Some claimed that he was.
Others said, "No, he only looks like him."
But he himself insisted, "I am the man."
"How then were your eyes opened?" they asked.
He replied, "The man they call Jesus made some mud and put it on my eyes. He told me to go to Siloam and wash. So I went and washed, and then I could see."
"Where is this man?" they asked him.
"I don't know," he said.
- John 9:1-12, NIV translation.
In John 9:13-34, the Pharisees questioned the man who was healed, refusing to believe that Jesus miraculously healed him, even though the man's parents testified that he had been born blind.