Mark 9:20-23

Then they brought him to Him. And when he saw Him, immediately the spirit convulsed him, and he fell on the ground and wallowed, foaming at the mouth. So He asked his father, “How long has this been happening to him?” And he said, “From childhood. And often he has thrown him both into the fire and into the water to destroy him. But if You can do anything, have compassion on us and help us.” Jesus said to him, “If you can believe, all things are possible to him who believes.”