John 3:12

If I have told you earthly things, and ye believe not, how shall ye believe, if I tell you of heavenly things?
— John 3:12, King James Version

In other translations

World English Bible (WEB)

If I told you earthly things and you don't believe, how will you believe if I tell you heavenly things?

American Standard Version (ASV)

If I told you earthly things and ye believe not, how shall ye believe if I tell you heavenly things?

Young's Literal Translation (YLT)

if the earthly things I said to you, and ye do not believe, how, if I shall say to you the heavenly things, will ye believe?