Mark 9:24

And straightway the father of the child cried out, and said with tears, Lord, I believe; help thou mine unbelief.
— Mark 9:24, King James Version

In other translations

World English Bible (WEB)

Immediately the father of the child cried out with tears, "I believe. Help my unbelief!"

American Standard Version (ASV)

Straightway the father of the child cried out, and said, I believe; help thou mine unbelief.

Young's Literal Translation (YLT)

and immediately the father of the child, having cried out, with tears said, 'I believe, sir; be helping mine unbelief.'