“Then Iesus answered, and said, O faithlesse and peruerse generation, how long shall I bee with you? howe long shal I suffer you? bring him hither to me.”
1611 King James Version (KJV)
17:17 O unbelieving and perverse generation - Our Lord speaks principally this to his disciples. How long shall I be with you? - Before you steadfastly believe?
Mt 17:17 O faithless and perverse generation. Intended especially for the disciples who had failed in the cure from weakness of faith. How long shall I suffer you? Bear with your shortcomings. Bring him hither to me. The emphasis is upon "me". This act of mercy could have been done by his disciples had they been devout, prayerful and believing.