Matthew 17:17-19

Revised Standard Version Catholic Edition

¹⁷ And Jesus answered, “O faithless and perverse generation, how long am I to be with you? How long am I to bear with you? Bring him here to me.” ¹⁸ And Jesus rebuked him, and the demon came out of him, and the boy was cured instantly. ¹⁹ Then the disciples came to Jesus privately and said, “Why could we not cast it out?”