Matthew 17:17-19

New Catholic Bible

¹⁷ Jesus said in reply, “O unbelieving and perverse generation, how much longer shall I remain with you? How much longer must I put up with you? Bring the boy here to me.” ¹⁸ Then Jesus rebuked the demon, and it came out of the boy, and he was cured from that very moment.

¹⁹ Then the disciples came to Jesus and asked him privately, “Why were we not able to cast it out?”