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Then the disciples understood that He spoke to them of John the Baptist.
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And when they had come to the multitude, a man came to Him, kneeling down to Him and saying,
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"Lord, have mercy on my son, for he is an epileptic and suffers severely; for he often falls into the fire and often into the water.
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So I brought him to Your disciples, but they could not cure him."
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Then Jesus answered and said, "O faithless and perverse generation, how long shall I be with you? How long shall I bear with you? Bring him here to Me."
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And Jesus rebuked the demon, and it came out of him; and the child was cured from that very hour.
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Then the disciples came to Jesus privately and said, "Why could we not cast it out?"
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So Jesus said to them, "Because of your unbelief; for assuredly, I say to you, if you have faith as a mustard seed, you will say to this mountain, 'Move from here to there,' and it will move; and nothing will be impossible for you.
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However, this kind does not go out except by prayer and fasting."
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Now while they were staying in Galilee, Jesus said to them, "The Son of Man is about to be betrayed into the hands of men,
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and they will kill Him, and the third day He will be raised up." And they were exceedingly sorrowful.