Learn English – Origin of “If I’ve told you once I’ve told you a thousand times”

etymologyidioms

I've searched the web and found only definitions and paltry speculation as to the origin of this scolding phrase. How did it get put together this illogical way? Are there tacet words in the phrase that, if said, would make it seem more logical, such as

If I've told you once, I [might as
well] have told you a thousand times
[for all the good it did].

Where does this phrase originate, and how did it end up getting phrased that way?