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

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?

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?'

Notes