Mark 9:12-21

12He answered them, “Elijah does come first and restores and reestablishes all things. And yet how is it written of the Son of Man that He will suffer many things [grief and physical distress] and be treated with contempt [utterly despised and rejected]?

13But I say to you that Elijah has in fact come [already], and they did to him whatever they wished, just as it is written [in Scripture] of him.”

14When they came [back] to the [other nine] disciples, they saw a large crowd around them, and scribes questioning and arguing with them.

15Immediately, when the entire crowd saw Jesus, they were startled and began running up to greet Him.

16He asked them, “What are you discussing with them?”

17One of the crowd replied to Him, “Teacher, I brought You my son, possessed with a spirit which makes him unable to speak;

18and whenever it seizes him [intending to do harm], it throws him down, and he foams [at the mouth], and grinds his teeth and becomes stiff. I told Your disciples to drive it out, and they could not do it.”

19He replied, “O unbelieving (faithless) generation, how long shall I be with you? How long shall I put up with you? Bring him to Me!”

20They brought the boy to Him. When the [demonic] spirit saw Him, immediately it threw the boy into a convulsion, and falling to the ground he began rolling around and foaming at the mouth.

21Jesus asked his father, “How long has this been happening to him?” And he answered, “Since childhood.