14 When they came to the disciples, they saw a large crowd around them and experts in the law arguing with them.
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.