17Someone in the crowd replied, “Teacher, I brought You my son, who has a spirit that makes him mute.
18Whenever it seizes him, it throws him to the ground. He foams at the mouth, gnashes his teeth, and becomes rigid. I asked Your disciples to drive it out, but they were unable.”
19“O unbelieving generation!” Jesus replied. “How long must I remain with you? How long must I put up with you? Bring the boy to Me.”
20So they brought him, and seeing Jesus, the spirit immediately threw the boy into a convulsion. He fell to the ground and rolled around, foaming at the mouth.
21Jesus asked the boy’s father, “How long has this been with him?”