Matthew 17:19

Thereupon Jesus' disciples came to him and asked him privately, "Why were we not able to cast it out?"

When he was alone his followers and the Twelve began asking about the parables.

When Jesus had gone into the house, his disciples asked him in private, "Why could not we cast it out?"

Treasury of Scripture Knowledge

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

When he was alone his followers and the Twelve began asking about the parables.

When Jesus had gone into the house, his disciples asked him in private, "Why could not we cast it out?"