Matthew 17:19

NIV: Then the disciples came to Jesus in private and asked, "Why couldn't we drive it out?"

NAS: Then the disciples came to Jesus privately and said, "Why could we not drive it out?"

KJV: Then came the disciples to Jesus apart, and said, Why could not we cast him out?

GWT: Then the disciples came to Jesus privately and asked, "Why couldn't we force the demon out of the boy?"

ASV: Then came the disciples to Jesus apart, and said, Why could not we cast it out?

BBE: Then the disciples came to Jesus privately, and said, Why were we not able to send it out?

DBY: Then the disciples, coming to Jesus apart, said to him, Why were not we able to cast him out?

DRB: Then came the disciples to Jesus secretly, and said: Why could not we cast him out?

WBS: Then came the disciples to Jesus apart, and said, Why could not we cast him out?

WEB: Then the disciples came to Jesus privately, and said, "Why weren't we able to cast it out?"

YLT: Then the disciples having come to Jesus by himself, said, 'Wherefore were we not able to cast him out?'