Berean Study Bible
I am telling you now before it happens, so that when it comes to pass, you will believe that I am He.

King James Bible
Now I tell you before it come, that, when it is come to pass, ye may believe that I am he.

American Standard Version
From henceforth I tell you before it come to pass, that, when it is come to pass, ye may believe that I am he .

Darby Bible Translation
I tell you [it] now before it happens, that when it happens, ye may believe that I am [he].

Douay-Rheims Bible
At present I tell you, before it come to pass: that when it shall come to pass, you may believe that I am he.

English Revised Version
From henceforth I tell you before it come to pass, that, when it is come to pass, ye may believe that I am he.

Young's Literal Translation
From this time I tell you, before its coming to pass, that, when it may come to pass, ye may believe that I am he;