Ezekiel 33:33

33 “When all this comes true—and it surely will—then they will know that a prophet has been among them.”

Read Ezekiel 33:33 Using Other Translations

And when this cometh to pass, (lo, it will come,) then shall they know that a prophet hath been among them.
When this comes--and come it will!--then they will know that a prophet has been among them."
But when all these terrible things happen to them—as they certainly will—then they will know a prophet has been among them.”