I told you so

• told you so, told you, I told you, What did I tell you

I told you so

1. Used to remind someone that they were already warned by the speaker/writer that a certain event would happen.
   • 1918 September–November, Edgar Rice Burroughs, “The Land That Time Forgot”, in The Blue Book Magazine, Chicago, Ill.: Story-press Corp., →OCLC; republished as chapter IV, in Hugo Gernsback, editor, Amazing Stories, (please specify |part=I, II, or III), New York, N.Y.: Experimenter Publishing, 1927, →OCLC:

     […] Of this he took a taste, and straightening up, looked into my eyes with an expression of elation—as much as to say "I told you so!"

   • 2023 April 1, Jonathan Weisman, “Trump and Fox News, Twin Titans of Politics, Hit With Back-to-Back Rebukes”, in The New York Times‎, →ISSN:

     For the left, the seismic week delivered an “I told you so” years in the making.

This phrase is often said as "I hate to say I told you so", as a form of paralipsis.