[16] And I brought him disciples, and they could not cure him. [17] Then Jesus answered and said, O faithless and perverse generation, how long with how long shall I suffer bring him hither [18] And Jesus rebuked the devil; and he departed out of him: and the child was cured from that very hour. [19] Then came the disciples to Jesus apart, and said, could not him out? [20] And unto them, Because for verily I say If ye have faith as a grain of mustard seed, ye shall say mountain, Remove to yonder place; and it shall remove; and nothing shall be impossible