Jeremiah 33:3 in the King James Version
Call unto me, and I will answer thee, and shew thee great and mighty things, which thou knowest not.
Context
2 “The LORD who does it, the LORD who forms it to establish it—the LORD is his name, says:
3 ‘Call to me, and I will answer you, and will show you great and difficult things, which you don’t know.’
4 For the LORD, the God of Israel, says concerning the houses of this city and concerning the houses of the kings of Judah, which are broken down to make a defense against the mounds and against the sword: