15 When the whole crowd saw him, they were amazed and ran at once and greeted him.
16 He asked them, “What are you arguing about with them?”
17 A member of the crowd said to him, “Teacher, I brought you my son, who is possessed by a spirit that makes him mute.
18 Whenever it seizes him, it throws him down, and he foams at the mouth, grinds his teeth, and becomes rigid. I asked your disciples to cast it out, but they were not able to do so.”
19 He answered them, “You unbelieving generation! How much longer must I be with you? How much longer must I endure you? Bring him to me.”
20 So they brought the boy to him. When the spirit saw him, it immediately threw the boy into a convulsion. He fell on the ground and rolled around, foaming at the mouth.
21 Jesus asked his father, “How long has this been happening to him?” And he said, “From childhood.