Immediately the boy's father exclaimed, "I do believe; help me overcome my unbelief!"
NIV
At once the father of the boy gave [an eager, piercing, inarticulate] cry with tears, and he said, Lord, I believe! [Constantly] help my weakness of faith!
AMP
And straightway the father of the child cried out, and said with tears, Lord, I believe; help thou mine unbelief.
KJV
"It has often thrown him into fire or water to kill him. But if you can do anything, take pity on us and help us."
NIV
And it has often thrown him both into fire and into water, intending to kill him. But if You can do anything, do have pity on us and help us.
AMP
And ofttimes it hath cast him into the fire, and into the waters, to destroy him: but if thou canst do any thing, have compassion on us, and help us.
KJV