Mark 9:23

Jesus said unto him, If thou canst believe, all things are possible to him that believeth.
— Mark 9:23, King James Version

In other translations

World English Bible (WEB)

Jesus said to him, "If you can believe? All things are possible to him who believes."

American Standard Version (ASV)

And Jesus said unto him, If thou canst! All things are possible to him that believeth.

Young's Literal Translation (YLT)

And Jesus said to him, 'If thou art able to believe! all things are possible to the one that is believing;'