And now I have told you this, before it happens, so that, when it will happen, you may believe
Other versions
King James Version
And now I have told you before it come to pass, that, when it is come to pass, ye might believe.English Standard Version
And now I have told you before it takes place, so that when it does take place you may believe.New International Version
I have told you now before it happens, so that when it does happen you will believe.