Then came the Disciples to Iesus apart, and said, Why could not we cast him out?
- King James Version (1611) - View 1611 Bible Scan

Then the disciples came to Jesus privately and said, "Why could we not drive it out?"
- New American Standard Version (1995)

Then came the disciples to Jesus apart, and said, Why could not we cast it out?
- American Standard Version (1901)

Then the disciples came to Jesus privately, and said, Why were we not able to send it out?
- Basic English Bible

Then the disciples, coming to Jesus apart, said [to him], Why were not *we* able to cast him out?
- Darby Bible

Then came the disciples to Jesus apart, and said, Why could not we cast him out?
- Webster's Bible

Then the disciples came to Jesus privately and asked Him, "Why could not we expel the demon?"
- Weymouth Bible

Then the disciples came to Jesus privately, and said, "Why weren't we able to cast it out?"
- World English Bible

Jhesus seith to hem, For youre vnbileue. Treuli Y seie to you, if ye han feith, as a corn of seneueye, ye schulen seie to this hil, Passe thou hennus, and it schal passe; and no thing schal be vnpossible to you;
- Wycliffe Bible

Then the disciples having come to Jesus by himself, said, `Wherefore were we not able to cast him out?'
- Youngs Literal Bible

Wesley's Notes for Matthew 17:19

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?

17:20 Because of your unbelief - Because in this particular they had not faith. If ye have faith as a grain of mustard seed - That is, the least measure of it. But it is certain, the faith which is here spoken of does not always imply saving faith. Many have had it who thereby cast out devils, and yet will at last have their portion with them. It is only a supernatural persuasion given a man, that God will work thus by him at that hour. Now, though I have all this faith so as to remove mountains, yet if I have not the faith which worketh by love, I am nothing. To remove mountains was a proverbial phrase among the Jews, and is still retained in their writings, to express a thing which is very difficult, and to appearance impossible. #Matt 21:21|; Luke 17:6.

17:21 This kind of devils - goeth not out but by prayer and fasting - What a testimony is here of the efficacy of fasting, when added to fervent prayer! Some kinds of devils the apostles had cast out before this, without fasting.

People's Bible Notes for Matthew 17:19

Mt 17:19 Why could not we cast him out? The answer is, Lack of faith.