Luke 9:37-41 New American Standard Bible (NASB)

37. On the next day, when they came down from the mountain, a large crowd met Him.

38. And a man from the crowd shouted, saying, "Teacher, I beg You to look at my son, for he is my only boy,

39. and a spirit seizes him, and he suddenly screams, and it throws him into a convulsion with foaming at the mouth; and only with difficulty does it leave him, mauling him as it leaves.

40. I begged Your disciples to cast it out, and they could not."

41. And Jesus answered and said, "You unbelieving and perverted generation, how long shall I be with you and put up with you? Bring your son here."

Luke 9